The hosting service may be national, but the group and its members are all from the Metro-Detroit area. If you want to go virtual to find a like-minded group of local singles, check out group listings on Meetup and/or Yahoo Groups. You may be able to define groups further by interests and/or neighborhoods. Note: You may have to wade through a lot of hookup groups, so be sure to check out each group's summary, prior posts and most recent activity.
Here's a smattering of some of the groups listed: