I'm go to Golds too. Interesting, the membership I have covers four different local Gold's and I notice that the four places have a way different characters:
Location A is a 30 something meat market
Location B is suburbia heaven
Location C is the real deal, but with a few folks who seem inordinately muscular, ala Barry Bonds
Location D is a get in, get it done, and get out site and the one I most frequently visit
So I suspect that a one week visit is probably a good thing so you can see whather you like the feel of a given gym. But what do I know, I'm just a middle aged guy trying not to check out early...