You can also check some of the NYC dining threads on this forum as well as the Community threads where FT-ers have had get togethers.

The delis are always reliable and first rate. Katz's is a find, Carnegie has the best meats but as Analise said always a line (unless you go like 11 am in the morning!)

Another place is Simply Pasta on 41st Street off Broadway. Main dishes are no more than $12-14 a person, many of the pastas made in house.

Have fun!