I'm the organizer of a Westchester wine-tasting group, on the meetup.com site. I choose the theme, allow 10 attendees, and bring 6-7 bottles of wine to a restaurant that permits no-corkage BYOB. We taste the wines blind and discuss them over dinner.
The group has gone very well so far---I've done 8 dinners and have more planned---and I'm looking for new restaurants to try. Either places that are BYOB all the time, or offer it one night a week as a special.
So far we've tried Palomino in Larchmont (our favorite, been there 3 times, BYO on Monday), 808 Bistro in Scarsdale and Harper's in Dobbs (both BYO on Weds), and Shiraz in Elmsford, Buon Gusto in Irvington, and Little Thai Kitchen in Scarsdale (BYO all the time).
I'd welcome any ideas for new places to go.