There was an excellent Cuban band here a few years back, they played some of the resorts and bars. But they could not get steady work on the island and went to play on the Mainland. Crazy Canucks has a more local flair on Monday nights, Punta and such. But Belize LOVES country music.
Country Boy, you would be very welcome to play at one of the jams about town, Thursday and Saturday at the Palapa, Sunday at Crazy Canucks and I don't know if Legends still has Tuesday nights as a jam or not. Friday in Caye Caulker offers a wonderful open mic for all musicians, and it is just a 20 minute boat ride away. Some local musicians will let visitors sit on on a few during regular gigs, as long as the bar does not mind, so there is the opportunity get to know the music scene here. Bring your guitar, sit in for a few and enjoy yourself.