Every girl is different and you should try to ask questions and find out about her personality before you ask for sex.
Some girls are very social, and others are conservative.
If you got into a "get to know you" type of conversation you could ask her about habits with previous boyfriends such as
"How/where did you meet your last boyfriend?"
"How long did you know him before you dated him?"
"How long did you see each other?"
Hope this was helpful.