they probably want to have sex with you.
if he doesnt even know you and gives you his number,
it's probably b/c he thinks ur fun and willing to do him b/c
you were flirting. his not looking for a relationship, trust me.
i've been working at a resturant for years and servers who i work
with would show off by giving girls their numbers and seeing
if they actually called. and if they did, they had sex and he'd
tell everyone at work about it. so if u want to be known as that
girl everytime u go to that resturant, call him.