A couple that begins their relationship with drunken sex after meeting at a club, then awkwardly attempts to make a go of things in the non-club world.
These couples typically find that they only feel comfortable going on more club dates and simply can't function in other scenarios.
Estimated time to expiration: 1-2 weeks. Very, very uncomfortable weeks.
At a restaurant:
club couple dude: "So...uh...Jennifer, do you play sports and stuff?"
clup couple broad: "My name is Jennette."
The most awkward silence possible ensues.