Well No DRama lite (my wife Andr?a sings and plays keyboard and Ken plays guitar) every Thursday at Sinatras 7-10, every Sat the whole band plays at The Finish Line 4-7 and every wed No DRama lite plays at the Checkpoint 4:30-7:30. You won't be disappointed if you like rock/blues/pop type stuff my wife has an AWESOME voice!
I think Sinatras has live music almost daily? Not sure of other people's schedules etc though sorry. Cabarete might have more variety.
Also at The checkpoint on Fridays from 5:30-8 the Green Brothers play Domincan music ( they are Dominican).