One of my favorites in all of Puerto Rico...
I love the ambiance! It is located in Old San Juan, so the Puerto Rico, and as soon as you walk in you feel like you're in a different world and once you've been there a few times, it feels very familial. They have their regulars that go every week, sometimes twice a week, for the ambiance, the food, and Sevillanas!
Yes, this is the only place that is purposefully set up so YOU can dance Sevillanas. They have a mini-class at the beginning, then they play several sets of Sevillanas. In between the Sevillanas they play salsa, merengue and a tiny bit of Rumba Flamenca.
The guys that work there have been there for while and are very nice and cordial. Every once in a greeeeaaat while when things aren't too busy (hardly never) they even dance a sevillana.
I've been to Spain three years in a row, plus the two times when I was little, and really the food is better than what you find in any ordinary tapas bar in Spain.
You are very hard pressed to find anywhere in the world a place with this relaxed, fun Sevillanas ambiance with a regular following.