I came on Wednesday Havana Nights on their roof top patio, so I cannot speak for any other parts of this big place. There is no cover and the dance lessons are free.
Dance lessons were held from 7 pm - 8:30. Two Latin dances are taught -- the night I was there it was merengue and chacha. The lady instructor was fairly good.
Since the dance area is on the rooftop, this is a venue that is only as pleasant as the outside weather. I have been told that summer dancing is intolerable (the tile floor must get hot enough to burn feet).
The dance floor is sizable but unfortunately is made of a glazed tile. So, don't come there with real dance shoes. It seems that the architects of this place never imagined that people really like to dance. Duh!
Most of the dances that night are salsa but there is also a generous amount of bachata, chacha, and merengue. Fortunately there was almost no free style (without a partner) dance being done. This is a place for partner dancing. Music is done by a DJ and as you might guess is almost entirely Latin.
The crowd was large and at times the floor was very crowded. Ability ranged from total beginner to advanced.
There were all ages but most tended to be in the 20-30 age range. I liked the young ladies because they dressed in skimpy hot pants, short skirts, and high heels. Ooooooooo! La! La!
Drinks were half priced and yet they were very boozy. Can't complain about that!
Unfortunately dancing stops at 11:30. The dance floor was full so I'm puzzled why they stop so early.
Overall this venue is a good salsa scene but I can't give it more than a 3 star because it has serious weaknesses. It seems as though dancing at DB was an afterthought after it was built -- either that or whomever designed it knew nothing about the needs of dancers.