A group of people from my school (including my friends) went clubbing, there were heaps of girls around and the most attractive guys hook up with some of the lest attractive girl there, I was honestly shocked because these guys usually have so much confidence in other situations with girls they don't know. So guys please to explain this?
TAKE NOTE: this is not some "omg I'm so jealous I get no attention boo hoo for me " thing, I just honestly don't understand :P
The definition of beauty "attractive" varies from a person to another. However, answering your question; maybe they were intimidated and scared they might be rejected. Or maybe they were looking for a quicker approach, assuming that a less attractive girl would be easier to talk to. Or perhaps it is just what avksxXXVII said! Who knows?
The attractive girls with the bombshell looks are usually in a relationship. Even if they're not, they probably expect some Abercrombie and Fitch model to ask them out. What guy would bother. That's asking for rejection and its always the guy who has to ask so girls don't know anything about that. Better to just go for a nice and quiet girl even if she isn't attractive because at least because odds are she's more humble.
The less attractive girls are usually less judgmental and have lower standards than the hot ones. So if the guys are just looking to hook up its a lot easier and less of a struggle than with the hot women.