An hour or so west of Orlando on I4 you have these...
http://www.seminolehardrocktampa.com/ Poker and table games (no roulette or craps)
http://www.tampadogs.com/ Poker
http://tampabaydowns.com/ Poker

If you want to stay close and just bet the dogs or Jai-Alai you have...
http://www.floridagreyhoundracing.com/
http://www.orlandojaialai.com/

For day cruises there are two about an hour east of Orlando at Port Canaveral...
http://new.lasvegascasinolines.com/
http://www.suncruzcasino.com/port-canaveral.asp