Originally posted by Mimik:
MAybe advertise to your co-workers or friends about starting a wine group or even the local wine store-simple ad.
Obviously keep the venue public if inviting people you don't know. Start off with a theme at a BYOB restaurant, ie Bordeaux or Cali Cab or something and go from there.
The group will attract others and become quite large quicker than you'd think.
As far as censoring wine-lovers out, I'm not sure that a good idea in the beginning and quite difficult to do. That's not what wine tasting is supposed to be about.