My friend said he couldn't tell if it was a compliment or an insult that a hot chick only wants to hook up with him, but not date seriously. On one hand, she is just using you for sex. On the other hand, shut the hell up.
I'm always very flattered and humbled when I get an invitation on facebook from someone I don't know, to attend something I never heard of, along with about 12,000 other people.