Non-singles meeting (Vienna)

Apparently singles meetings are the new trend on Internations.

Good, but what to do when you're not single?

I know, it's even easier going out - you might say - when you have a partner or spouse. Then you meet other couples...

But what if you live in a long-distance relationship? Or if you'd like to spend a night with other people, just ever now and then? (and you don't want to fake being single)

I'd like to hear your thoughts: Would it make sense to set up get-togethers for people who are not interested in the dating/new relationship game?
(or would they simply be too boring?)

Cheers,
Wolfgang
(happily married)