I've had this happen a few times. I'm not sure what the best way is but I remember one of the worst ways. I was going to respond to a similar thread about asking strippers for extras but noticed I was going a bit off topic about dancers asking guys out.
Was going to list one of the worst ways but decided to reverse that.
I would say at least an introduction similar to asking for a lap dance to let a guy know who she is. She doesn't interrupt a guy when he's going to tip a dancer but waits until he is coming back or already standing still or sitting down.
I'll let others add more, it's getting late here.


Most dancers know when I am about to leave so I will assume they pick up on customer habits. I think the best time to ask for the date is when he is about to go. This will help convince the guy the lady is not trying to make a last minute sale. She should also say bye to further push that point home, if necessary. A female customer should just make the approach when the guy is not preoccupied.