Step-N-Swing Dance Aerobics: Participants in this low-impact aerobic dance class will use the patented Body Bat Aerobic Exerciser. 10:30 a.m. $5. Treasure Island City Hall Auditorium, 120 108th Ave. (727) 547-4575, ext 237.
Bay Pines Toastmasters open house: Meet members and experience what Toastmasters can do for you. 5 p.m. Bay Pines VA Healthcare System, 10000 Bay Pines Blvd., St. Petersburg. (727) 398-6661.
Learn to be a leader: The City Power Toastmasters Communication and Leadership program is designed to help people become better communicators. Noon to 1 p.m., 1 Fourth St. N, Room 600, Municipal Services Building, St. Pete. Call (727) 893-7918.
Taj Mahal: The musician named after the grand building plays a concert celebrating four decades of blues, roots and reggae. He has earned two Grammys. 7:30 p.m. $42-$55. Palladium Theater, 253 Fifth Ave. N, St. Petersburg. (727) 822-3590. spcollege.edu/palladium.
'7 Homeless Mammoths Wander New England': An "academic sex comedy." 8 p.m. $39 Tuesday-Thursday evenings and Saturday-Sunday matinees; $49 Friday-Saturday evenings. American Stage, 163 Third St. N, St. Petersburg. (727) 823-7529. americanstage.org.
Swing Time Dance: Swing Time rocks the Gulfport Casino Ballroom with "hot jump blues" and traditional rock 'n' roll by Keith Jones and the Makeshifts. Dress in 1950s attire for a night with a shag dance lesson at 6 p.m. and a swing dance lesson at 7, followed by open dancing at 8. $10. 5500 Shore Blvd. S. (813) 840-3715.
Summer Marine Adventures Day Camps: The Pier Aquarium and Secrets of the Sea are registering kids 6 to 14 for weeklong summer camps at the Madeira Beach Recreation Center. Cost is $215 with discounts available for siblings and multiple registrations. Fees include trips to the Florida Aquarium, Fish and Wildlife Research Institute and the Clearwater Marine Aquarium. To see a list of camps, go to tinyurl.com/tbtimes-sea. For information, call (727) 895-7437, ext. 215.
Startup Weekend Tampa Bay: This three-day event will connect local entrepreneurs, developers, designers and startup enthusiasts with mentors and resources at the University of South Florida St. Petersburg. During the 54-hour event, those attending will share ideas, form teams and launch startups. On Sunday the teams will pitch their ideas to a panel of judges composed of some of Tampa Bay's most knowledgeable business leaders. Registration is $99, with discounts available for students. Register at swtampa0613.event brite.com. For information, go to tampabay.startupweekend.org.
Senior excursion: The St. Pete Beach Community Center is offering a trip to the SS American Victory with lunch at Channelside. Departs at 9 a.m. from 7701 Boca Ciega Drive and returns by 4 p.m. Register by Wednesday. $12 for residents, $15 for nonresidents. Information: (727) 363-9245 or spbrec.com.
Zumba party: The Seminole Recreation Center is having a Zumba Bash from 6 to 8 p.m. at the Holland G. Mangum Recreation Complex, 9100 113th St. N. All ages invited. $10 in advance, $15 at the door. Call (727) 391-8345 for information.
Get Downtown First Friday Music Series: Fun, music and food between Second and Third streets on Central Avenue. 5:30-10 p.m. Free; refreshments extra. (727) 393-3597.
Sand Dance: Dance at this annual beachfront event with drink specials, a fire pit and music by the Horny Toads. 6-10 p.m. No cover. Harry's Beach Bar, 5300 Gulf Blvd., St. Pete Beach. (727) 363-5100.
'Doubt': The Pulitzer-, Tony- and Oscar-winning drama. 8 p.m. $22. Academy of St. Petersburg City Theatre, 4025 31st St. S. (727) 866-1973. spcitytheatre.org.
Kurt Elling: The Grammy Award winner brings his soaring vocals and edgy lyrics to the Palladium Theater. 8 p.m. $15-$40. 253 Fifth Ave. N, St. Petersburg. (727) 822-3590. mypalladium.org.
Young Dramatists Project: For the first time in 13 years Gorilla Theatre solicited scripts from the entire state. A variety of plays were chosen. These are professionally staged readings of short plays by the authors of tomorrow. 8 p.m. $15, $5 students. Freefall Theatre, 6099 Central Ave., St. Petersburg. (727) 498-5205. freefalltheatre.com.
Safe boating course: U.S. Coast Guard Auxiliary Flotilla 72 offers a program for people 14 and older. Registration required: email@example.com. 8:30 a.m.-4:30 p.m. $24. 1300 Beach Drive SE, St. Petersburg. (727) 898-1324.
Tampa Bay Rays versus Baltimore Orioles with a concert by Martina McBride: Buy a $35 press level ticket and get a Rays Italian hat. 4:10 p.m. Tropicana Field, St. Petersburg. tampabay.rays.mlb.com.
Vintage car show: Admire 75 vehicles from the 1920s through the 1980s, then grab a bite from the food truck rally. 11 a.m.-2 p.m. $15. Armed Forces History Museum, 2050 34th Way N, Largo. (727) 539-8371.
Summer reading party: Includes games, face painting and a moonwalk. Noon-3 p.m. Gulfport Library, 5501 28th Ave. S. (727) 893-1074.
Simon Kidgits Club Lil Chefs: Pint-size food lovers can learn about cooking at this free event. Bring a nonperishable food donation for an area food bank. 1-3 p.m. Tyrone Square Mall, 6901 Tyrone Square, St. Petersburg. (727) 347-3889.
Warehouse Arts District Trolley Ride: Hop on and off a trolley to explore works at more than 10 galleries, warehouses and studios in the Warehouse Art District. 5-9 p.m. Free. Trolley Parking Lot, corner of Central Avenue and 29th Street, St. Petersburg. (727) 327-3473.
'A Complex Intuition': Wood-turning opening reception and artists talk, 6 p.m., Michele Tuegel Contemporary, 320 Central Ave., St. Petersburg. (727) 823-1100.
St. Pete Blues All Stars: Jon Puhl on guitar, Kim Harpo on harmonica, Mike Delaney on sax, Liz Pennock on piano, Dr. Blues on guitar, Don Cox on bass and Dave Gill on drums, with vocals from all. 8 p.m. $12 advance; $15 day of the show. Palladium Theater, 253 Fifth Ave. N, St. Petersburg. (727) 822-3590. spcollege.edu/palladium.
'Canned Art': This show is based on graffiti artists painting empty spray cans. Be there for the opening during Art Walk. 8-10 p.m. Free. Eve N Odd Gallery, 645 Central Ave., St. Petersburg. (727) 251-6458.