for New York City (and surroundings)

There's a couple of salsa directories for the Big Apple, so just stroll around virtually before doing it physically:
[ New York City salsa/mambo calendar for 'break on 2' aficionados | This Week in New York (Latin Music Online) | Manhattan | salsaflava | NewYorkMambo.orG | Al B Productions ]

OK, but finally let me also provide something to the community ;-) - here's the Latin Dance entries:

Baraza
133 Avenue C
New York, NY
Phone: (212) 539-0811
DJ: Laz
Cuban salsa and funk beats.

Bistro Latino
1711 Broadway, on Broadway and 54th St.
New York, NY
Phone: (212)245-7099
Pan-Latin-American menu, dancing, and live entertainment.

Copacabana
617 W 57th St, Between 11th and 12th Avenue
New York, NY
Phone: (212) 582-2672

El Flamingo Club
547 West 21st Street, Between 10th Ave and West Side Hwy
New York, NY
Phone: (212) 243-2121

Hush
17 West 19th Street (between 5th and 6th Avenues)
New York City
DJ: Henry Knowles and Carlitos Vega
Tel: (212) 989 4874
Simply Salsa every Monday 18:00 - 1:00. Complimentary Buffet, complimentary Salsa and Cha-Cha Lessons from 18:00 - 18:45. provided by Henry Knowles

Latino Brothers 735 West 50th Street and 10th Ave.
New York, NY
Phone: (212) 445-0889

Latin Quarter 2551 Broadway
New York, NY
Phone: (212) 864-7600

Plush
222 Sunrise Highway, Rockville Center (Long Island)
Phone: (516) 764-0100
DJ: Ash, Don Juan
salsa, merengue, house and freestyle in the main room.
dress to impress. 21 and over.

Club Rio
9235 4th Ave Brooklyn, NY Phone: (718) 238-6566 live Latin performances on Fridays and Saturdays DJs Michael Kuilan and Carlos Franco play salsa, merengue, house, HIP-HOP, reggae and classics.

S.O.B.'S
204 Varick Street at West Houston
New York, NY
Phone: (212)243-4940
S.O.B.'s stands for Sounds of Brazil and beyond.