Hi guys
This link will hopefully point you in the right direction...
http://groups.google.com/group/climbing-zh
They regularly meet up for gym sessions, mainly at Schlieren and generally get out and about. I've got involved a few times and know a few of the gang. I haven't had too much to do with the group recently as I live in Baden and have a fairly regular climbing partner who I train with in Lenzburg and generally hit the crags with.
That said I have promised myself to be a bit more social with it and get more involved again. I will be at Lenzburg tomorrow night probably, just in case you're in that neck of the woods and fancy saying hi.
Aim for this season is to red point 7a so I'm keen to get out as much as possible, so I'd probably be a safe bet should you ever be short of a belayer. Definitely looking forward to some awesome days out on the rocks. Happy climbing!