quote:or has any advice on how to maintain some sort of editorial control over who's invited in
Why not just don't invite people you don't want to come?
Setting up a group with strangers is a tough way to go. What you have envisioned is a fairly casual thing, so I don't know why you don't ask a friend or two who like wine - you worked in restaurants, etc., and know people so maybe some of those old colleagues.
Or organize an offline or two somewhere and if there are a couple people you like out of those who attend, talk to them about it separately. Of course, if that's the format that works for you, just organize an offline every month and ask people to PM you. Then you can tell the people you want to exclude that they're too late but you'll surely put them on a waiting list. (Happens to me all the time.)