"Hey, do you want to come home with me?"
if yes, take her home
if no:
"Alright, that's cool. So, blah blah blah..."
If you plant the idea of coming home with you, there is the possibility she will just need to warm up to you a bit and start flirting and eventually you will bed her or at the very least get her number, just do everything nonchalantly. Worse thing that happens is she openly rejects you(aka mace).