1 DNCE: A free show with a Jonas brother? Sweet as cake. Joe Jonas and DNCE did a killer job rocking through Born to Hand Jive during Fox's Grease Live. But would anyone have opposed them performing their own big hit Cake by the Ocean instead? The ex-JoBro's exuberant ode to living dangerously has been inching toward the Top 10, with DNCE's goofy, go-for-broke performances charming the pants off any crowd. On Saturday, that could include you — if you're willing to brave a crowd. DNCE is headlining the second "90 Free Free" concert at Jannus Live, 200 First Ave. N in St. Petersburg. The show is free, but it's first-come, first-served, so expect a crazy line. Co-presenters 93.3-FLZ and Visit St. Pete Clearwater are also throwing in an opening set by Nathan Sykes, formerly of British boy band the Wanted, who's venturing into solo waters with Over and Over Again, his new single with Ariana Grande. The show is at 7 p.m., but we'd recommend getting there way earlier. See 933flz.com.
2 Free deck tours of tall ship: The tall ship Lynx, an interpretation of a Baltimore privateer schooner used during the War of 1812, is docked at the Harborage Marina at Bayboro this week and on Sunday will have free deck tours from 9 a.m. to 1 p.m. Note the ship is not handicap accessible. The marina is at 1110 Third St. S, St. Petersburg.
3 Environmental Film Festival at Eckerd College: Now in its 18th year, this annual collection of seldom-seen cinema with eco-friendly themes is shown free at the college's Miller Auditorium, with directors and producers on hand. Friday features Explorations of the Amazon: Embrace of the Serpent, inspired by the travel diaries of German explorer Theodor Koch-Grunberg. Saturday features Nature's Song: The Messenger, a documentary that warns that the fate of songbirds might mirror our own. Wednesday brings the Cannes Film Festival Art Cinema Award winner Saving Species: Racing Extinction, about the global illegal wildlife trade. The festival runs through Feb. 27. Find the full lineup of films at eff.eckerd.edu. Films are shown at 7 p.m. each night except Sunday, when the screening is at 2 p.m.
4 Chocolate Festival: Local food trucks and vendors offer everything from entrees to desserts and beverages made with chocolate noon to 8 p.m. Saturday; vendors include Churro Express and Trucktoberfest. Pet-friendly, rain or shine. Free admission, menu prices vary at Centro Asturiano, 1913 N Nebraska Ave., Tampa, 33602. (813) 562-9599. (Please note this event has moved from Generation Food Court in Seminole Heights.)
5 Black History Festival: This celebration of African-American heritage in the parking lot of the Midtown Walmart in St. Petersburg includes food samples, free health screenings, children's activities, entertainment and giveaways 10 a.m. to 2 p.m. Saturday. Free. Walmart, 1794 22nd St. S, St. Petersburg. (727) 892-5087.
Times pop music critic Jay Cridlin contributed to this report.