I have a few unemployed hipster friends who get laid a fair amount because their idleness enables them to go to hipster parties where they meet other idle hipsters to have sex with.

I'd argue that overall, having a job, unless it's a job that can easily get you laid (barman/barmaid, working in a shop, especially if you're a heterosexual male working in a clothes shop with an 80+% female clientele, music/artistic performance) is a net negative for your sex life. Working 60 hours/week in a tech company office, if you're a heterosexual male, is probably not as conductive to your sex life as being an unemployed bum who spends a couple of hours a day wandering the streets of a large city talking to strangers. Obviously, if you're a heterosexual female, being paid to be around a bunch of males in a tech office is probably going to massively help you get laid, but I think the key variable is just "number of potential partners encountered", not employment status.