There are quite a few gay clubs in Long Beach and of those there is one that hosts a lesbian night called club Cherry on Wednesdays. I have a lot of lesbian friends though and I know none of them are into Threesomes including men.lol If its just her trying to get lucky I am sure it wouldnt be to hard but   a married couple from out of town looking for a one night stand with a random hottie  for freee in La will probally be difficult @ the gay bar. I think your best bet would be to go to a straight bar off of Pike street.I love the dueling piano plae and they always have several beautifull women there it seems.Another option would be a swingers club or posting an ad on craigslist or another adult hook up site.  However if your wife is A hottie and has game and exudes confidence when hitting on Females then it should be easy to  find a women at any bar in Long Beach