Are there any sites out there like match.com that are specifically for finding friends, not dates?

I already have a romantic relationship but I need a network of girlfriends to go with me to the things my guy won't. The people at work are all fuddy-duddies & all the groups I've found in town cater to people looking for a mate. If I don't find someone to listen to me gripe about my guy, I'll go crazy!! Any ideas?