My wife and I will be in SFO on Sunday and Monday nights in a few weeks.  We'll ride the cable cars during the day but what are some sexy clubs/experiences a middle-aged couple from the Midwest should avail themselves to while in San Francisco?

a Swinger club in SF...I went to the old location, have not been to the new one, but I always found it fun.

I went to MBOFT (sp?) a few times and my male friend and I would go and do private shows, that was hot too