I find the Coba lobby to always be lively. Tulum, on certain nights, will have a DJ outside which is fun. But in my experience, Coba always has something. Plus they have the wine bar which always has live music at night.
At the moment there's 16 of us going as it's quite a journey getting there but it'll be nice having the holiday with them all before the wedding!
Coba and tulum have good music but we mostly kept to the main bar in Akumal, last time they did some greats shows and dances on stage then music afterwards, our children loved the entertainment before the shows so they were worn out before the music. The hacienda was nice also.