newbie in need of help

Hi ladies! I am in need of some help and I know I have come to the right place.

My best friend is getting married about a month ahead of me. Her sister and I are planning her bachelorette party and we are looking for nice restaurants on the island that are moderately priced and that have an atmosphere conducive to 'adult' conversation (it's a bachelorette party--wink wink) and to a more secluded room or space. Any ideas? We plan on heading to a country bar in Commack to go dancing later in the evening, but wanted to start off the evening with dinner. BTW: Bride-to-be (my best friend) is lactose intolerant...so that might also have an effect on things!!! Thanks everyone!