You're at a fairly crowded club in Los Angeles. You're a pretty sizable guy yourself and can hold your own in a fight. The girl you're with came with you, but you're not an item. You've had sex with this girl before.

You don't want to be clingy and be dancing on her the whole night, so you break away and dance in your own space for a bit. Near her, but not up on her. A guy comes up and starts grinding on her. She looks noticeably uncomfortable but doesn't push him away or move away. How do you handle it?