We took the beginner drop-in class, which they offer every Tuesday at 8:15 p.m. Both instructors were very competent, helpful and on the ball. Afterwards, Gretchen and capitalism-yeah took turns dancing with me. After they left, two women asked me to dance. There were probably 60 - 80 people there overall. They also served snacks (strawberries, chips, cookies), and had several coolers of water set up.
Downsides: the music is loud (though there are areas where it is much quieter, and you can talk), and it can get stifling hot (no a/c).