This is a great thread, I wondered some of the same things. And the advice about thinking it's harder to hook up with couples than it is, we are totally concerned about that.
I think my DH and I are both moderately attractive, but we worry that we won't be able to attract any couples "up to our standards." Not that we are snobs, but I'm sure everyone has experienced being hit on by people that just totally do not do it for you.
That's one reason we are so hesitant to go to clubs, we're worried about walking in and thinking "blech" to most people there or on the flipside, walking in and realizing we are out of our league and being the "blech" couple in a crowd of hotties!