1 Florida Orchestra Pops in the Park: You can picnic under the stars at Curtis Hixon Park while the orchestra plays a mix of familiar symphonic and pop favorites from Brahms to Beauty and the Beast, Superman and Star Wars. Bring canned goods for Tampa Bay Harvest's annual food drive, too. Ryan Haskins conducts at 7:30 p.m. Sunday at 600 N Ashley Drive, Tampa. Free. floridaorchestra.org.2 International Drone Day: Now's the chance to get a look into the controversial world of drones and see what these mini flyers can do. An exhibition drone race will start at 10:30 a.m. with drones flying through an obstacle course at 70 mph. It's free to check it out starting at 9 a.m. Sunday at A La Carte Event Pavilion, 4050 Dana Shores Drive, Tampa. (914) 474-1939. www. flycigarcity.com.3 Kentucky Derby: You'll find parties at both the horse track at Tampa Bay Downs and Derby Lane greyhound track, where you can wager and watch a simulcast from Churchill Downs all day. Admission is $3 starting at 12:30 p.m. Saturday at the horse track at 11225 Race Track Road, Tampa. And it's free admission starting at 10 a.m. at Derby Lane, 10490 Gandy Blvd. N, St. Petersburg. Both will have mint juleps and live racing starting at 12:30 p.m. Post time for the 143rd annual Run for the Roses at Churchill Downs in Louisville is 6:34 p.m.4 Concerts in the park: Two local parks are letting you ease into the weekend with free concerts on Fridays. The Jah Movement Reggae Band will play at Lowry Park, 7525 N Boulevard, Tampa. And the Sunset Music Series at Dunedin's Weaver Park kicks off the four-week series with the alternative rock band the Outpatients. Bring a blanket or lawn chair to 1258 Bayshore Blvd. to watch the sunset over St. Joseph Sound. Both start at 7 p.m.5 Train Weekend: Kids of all ages can ride the miniature trains chugging through Largo Central Park this weekend. The trains have been running for free the first of every month for 25 years thanks to the hobbyists who maintain the Largo Central Railroad. Donations for train maintenance appreciated at 101 Central Park Drive. 10 a.m. to 4 p.m. Saturday-Sunday.