St. Patrick's Day River O'Green Fest: Once again, Tampa celebrate St. Patrick's Day by dyeing the Hillsborough River with a bright green, bio-degradable dye. 10:30 a.m., Curtis Hixon Park, 600 N Ashley Drive, Tampa. Free. (813) 274-8615.
Richard Nader's Doo Wop Reunion XV: The reunion returns, this time starring The Cleftones, The Duprees, Tommy Mara and The Crests, The Vogues, The Dubs, Ladd Vance and more. 7 p.m., Ruth Eckerd Hall, 1111 N McMullen-Booth Road, Clearwater. $45-$95. (727) 791-7400.
Two Man Group: Following the success of ABC's Whose Line Is It Anyway?, Colin Mochrie and Brad Sherwood have teamed up to present an evening of improvisational comedy. 8 p.m., Mahaffey Theater, 400 First St. S, St. Petersburg. $37.50-$57.50. (727) 893-7832,
Meet Author Randy Wayne White: The New York Times Bestselling author returns with his latest Doc Ford novel, Deep Blue. Deep Blue must be purchased on site to be signed. 2 p.m., Inkwood Books, 216 S Armenia Ave., Tampa. Free. (813) 253-2638.
Wellington International Ukulele Orchestra : The New Zealand phenomenon have a signature sound that features high-octane ukulele solos and multi-part vocal harmonies. 8 p.m., Palladium Theater, 253 Fifth Ave. N, St. Petersburg. $35-$55. (727) 822-3590.
You Must Love Dogs Festival: Country singers Jo Dee Messina and Jessica Lynn headline this giant festival with dog competitions, a 42-foot dog diving pool, Frisbee dog performances and more. 10 a.m., Raymond James Stadium, 4201 N Dale Mabry Highway, Tampa. $7.50-$75. (813) 369-1204.
Cuban Sandwich Festival : World's Biggest Cuban Sandwich: Who makes the best Cuban sandwich? Come taste the contenders, with cultural vendors, live entertainment, and world's largest Cuban sandwich attempt (goal is 115 feet). 11 a.m., Hillsborough Community College Ybor City Campus, 2112 N 15th St., Tampa. Free admission, food and drink extra.
Spring Beer Fling: The nostalgic-retro-surf rock festival features seasonal beers, food and a daylong lineup of surf-rock bands including headliner Rusted Root. 21 and older only. 12 p.m., Coliseum, 535 Fourth Ave. N, St. Petersburg. $17 advance, $25 at door; $95 advance, $125 at door (VIP). (727) 488-0320.
March Blues Music Experience: A flavor of blues to suit every taste with artists Rory Block, Bobby Messano and more. 1 p.m., Kapok Special Events Center, 923 N McMullen-Booth Road, Clearwater. $40, $30 advance. (727) 725-8733.
Black Coffee: When a physicist dies after consuming a poisoned beverage, sleuth Hercule Poirot must solve the mystery, in this Agatha Christie tale. 8 p.m., St. Petersburg City Theatre, 4025 31st St. S, St. Petersburg. $22, $10 students. (727) 866-1973.
Mad Hatter's Masquerade Ball: Unique hats or masks are required to enter the gallery's annual fancy ball with an avante garde fashion and body art runway show. 8 p.m., ARTpool Gallery, 2030 Central Ave., St. Petersburg. $15, $25 VIP. (727) 324-3878.
Inherit the Wind: The great American drama of a science teacher put on trial for teaching evolution is loosely based on the Scopes Monkey Trial of 1925. Through March 27. 8 p.m., Stageworks Theatre, 1120 E Kennedy Blvd., Tampa. $30-$40. (813) 374-2416.
DJ Jazzy Jeff: Best known as half of the hip-hop duo with Will Smith in the mid '90s. 8 p.m., Shephard's Beach Resort, 619 S Gulfview Blvd., Clearwater Beach. $10 and up. (727) 442-5107.
KIDS AND FAMILY
Flashlight Egg Hunt: Kids ages 4 to 10 need to bring a flashlight and a basket to hunt for thousands of eggs at this Easter themed event with arts and crafts, games and a hot dog picnic. 6:30 p.m., Martin Luther King Jr. Recreation Center, 550 Laura Lane, Dunedin. $8 advance, $12 after March 16. (727) 738-2920.
SERIES PREMIERE Party Over Here, 11 p.m., Fox. The new late-night sketch comedy series, executive produced by the Loney Island comedy trio (Andy Samberg, Akiva Schaffer and Jorma Taccone), continues its maiden run with another half-hour of much-needed laughter.
MORE TO EXPLORE
Find date night ideas at tampabay.com/things-to-do.