DH made me wait about 2 months....
The 2nd time we hung out, he brought alcohol ..and we got drunk, but surprisingly when I tried to make a move, he said no. I figured that's what he had in mind when he brought the booze, but I was wrong. I'm glad we waited a while though.
We've been together since 07' .
I'd wait a pretty dang long time. I really have to trust a person to have sex with them, so a few months. If a person doesn't want to wait around for that then we aren't really on the same page anyways.
DH and I worked together and flirted with each other for about a month, then about a week after 'seeing each other' we had sex. It was lovely. We've been together 4 years, married 3...and inseparable ever since.