lol...
I was out the weekend just gone with 18 year old girls who looked older than 18 and got ID'd in certain clubs.. so not everywhere is like it.. the more up market places are more strict

I personally don't even bother asking their age, if I think their over 18 and they look and act over 18 it'll do for me.. guess my viewpoint would change if I woke up next to a 14 year old though.. but I don't think I'm idiot enough to make that mistake