^You'll find Latinas in every nightlife scene in NYC but if you want straight Latin clubs/lounges your best bet is Dyckman Street in Inwood, Steinway/Broadway/31st St in Astoria, and Roosevelt Ave/Northern Blvd in Jackson Heights. Or nights promoting Latin music in rotating venues in the East Village, LES, Bleeker St, SoHo, Midtown.
I'm sure there are plenty of places in the Bronx and Brooklyn too like Bushwick, Sunset Park, Williamsburg, East Harlem and the South Bronx. Might have a rougher crowd though.
A few places:
http://www.soncubanonyc.com/intro.html
http://www.sofritony.com
http://www.lqny.net/
http://www.doncoqui.com/queens/index.php?id=1