Hi Dee. Fellow member AinsleyS recently gave John and I an education in the differences between techno, house & trance. Hopefully, she'll chime in here. Now, I have to go back to all those clubs and figure out which variation they play. Here's what I do know.
Coco Maya plays house at their bar on the beach. Their other bar/dance area closer to the street plays hip-hop/reggaeton and seems to be a lot more popular.
Bali Club does a lot of techno and house.
Mamitas Beach has a dj spinning, seems like it's a lot of trance.
Blue Parrot does techno, dance, reggaeton, hip-hop, latin pop.
Some other places you might want to check out are
El Cielo,
Zenzi, Bang, and
Santanera.
Have fun!