REO Speedwagon: Get ready for a classic rockapalooza as the Can't Fight This Feeling rockers team up with Styx and the Eagles' Don Felder for the "United We Rock" tour. 7 p.m., MidFlorida Credit Union Amphitheatre at the Florida State Fairgrounds, 4802 U.S. 301 N, Tampa. Start at $27.50. (813) 740-2446.
Phantogram and Tycho: The electro-alternative duo and psychedelically trip-hoppy producer are teaming up for a co-headlining tour. 6:30 p.m., Jannus Live, 200 First Ave. N, St. Petersburg. $33-$76. (727) 565-0550.
Gulfport Tuesday Fresh Market: With live music from jazz to rock, pop to island, plus vegetables and fruit, baked goods, herbs, teas, plants, crafts, handmade jewelry 9 a.m., Gulfport, along Beach Boulevard, Gulfport. Free. (727) 902-2326.
Summer Nights: Busch Gardens celebrates summer with extended hours, three themed party zones, DJ dancing, thrill rides in the dark, an all new ice show and summer themed cuisine. Included with regular daily admission. 10 a.m., Busch Gardens, 10165 N McKinley Drive, Tampa. $99, $79 ages 3-9, 2 and younger free. (888) 800-5447
Wordier than Thou: Prose and Short Story Open Mic: A unique open mic series focusing on storytelling. Poetry and musical performances are not allowed. Includes a performance by a featured reader followed by numerous 10-minute open mic slots. 7 p.m., Studio@620, 620 First Ave. S, St. Petersburg. $5. (727) 895-6620.
KIDS AND FAMILY
Regal Summer Movie Express: The SpongeBob Movie: Sponge Out of Water and The Adventures of Tintin: Select Regal Cinema Theaters will show G and PG-rated movies for $1 every Tuesday and Wednesday throughout the summer. Benefits the Will Rogers Institute. Also taking place at Citrus Park Stadium 20 in Tampa. 10 a.m., Park Place Stadium 16, 7200 U.S. 19 N, Pinellas Park. $1. (727) 525-7777.
Weekend in Havana, 8 p.m., PBS: A walking tour spotlights the people, architecture, culture and history of Cuba.