The bar to listen to good choro and samba. The advantage of it over Semente, also listed here, is its unique decoration, with chairs hanging over your head and old antique tables and couches to chill out. The service is very nice; you do have the feeling that the owner and his friends work there.
300 people can fit there, but since many of them do dance (it's gorgeous to watch!), I wouldn't recommend it when it's too crowded.