we are planning ahead for a celebratory party (not a wedding or anything) in october. we'd like to probably do lots of great apps and an open bar - beer, wine, lots of champagne and drinks - probably park slope area but we'd consider anywhere in brooklyn. (don't and can't pay for a formal sit-down dinner). want a private room and nice space. good service. we'd even consider upping it to buffet and passed apps. classy and good food (the latter being very very important.) any ideas? easily 50 people. i thought tempo. i was wondering about the new greek place in bay ridge. really, we're open to anything. ideas?