I am starting this meetup because I was part of the City Park tennis meetup last year, and like many, I was sorry to see it go away. This is the same concept; mixed doubles, if you really want, do singles, you'll just look a little antisocial. This meetup will have the added bonus of after tennis beers, or apres cocktails if that suits you better. They can conveniently be had somewhere on 17th Ave.
I am thinking Thursday nights (so it won't mess with your social calendar). Tennis: 6:30pm to 9pm, then the apres thing.
I don't know if you have to be part of Trails and Ales to do this meetup (who's going to bust you?), but it's a great group that does much more than hike trails and drink beer.
It shouldn't be hard to get as good a group together as was done last year. So let's do it again.