This is a cross post of the Jewish Mosic Outdoor Mountain Club's Annual Winter Party. This is a fine non for profit club that does a lot of outdoor events but also has many cultural and museum orietned activities. Below is the excerpt from the MOsaic meetu site.

Register now!
RSVPing here does NOT register you for the party. You must pay to register.
7:30 PM till Midnight
at Ansche Chesed, 251 West 100th Street (near West End Ave)
Music, Dancing, Snacks and Games
Catch up with old friends! Meet new friends!

Early registration by February 16th
Pay only $18
or
Volunteer at the party and pay only $8 (Wow!)
or
Pay $25 at the door

Last year over 200 people had a great time!
Register online at www.mosaic-gny.org
7:30 - Square Dancing with professional caller
9:00 - DJ and Dancing
Plus games! (bring your favorite)

Join or renew your membership when you pay for the party and take $5 off the annual membership fee. $30 - $5 = $25 for your Mosaic-GNY membership!. See the party online registration pages for details.