Surprise party venue?
If you want Vecchio Frak in Little Italy is a great place! It has good food and exotic drinks...the website for the place is : http://www.vecchiofrak.com/ Check it out, it's a fun place. I'm not sure what type of crowd you are looking for etc. but it's a younger crowd (26 up to maybe about late 30's?) but a really nice place. You can also book the couch area or the lounge areas etc.....check it out.