Never give a girl your number without getting hers. She's adding that sh*t to her trophy collection of AFC phone #'s. Don't expect the girl to call. Get a # from the girl and dial it in front of her. This will ensure a right #. It won't ensure a date or a relationship.
Give me your number. I'll give you a call. (W0manese: I want to let you down easy. I hope you eventually leave me alone.)
Get the girl's # at all costs.