I know giving the girl your number is a cop out. However, I'm in a situation with this girl at work where it may work to my advantage. She's new and I've done things to gain her attraction. She's given me IOIs and comes to my desk. I'm having a New Year's Eve party and would like her to come. Since the dynamics are in my favor right now with her coming to my desk, I really don't want to go to her and ask her to come to the party. I want to make the invite spontaneous, so the plan is next time she comes to me, I'll bring up new year's eve and how I'm hosting a party with my friends. Then I'll be like "you know what, you should come, it'll be fun, let me give you my number. Give me a call if you're in town." Is this acceptable? Or should I stick with something more traditional like "Hey you should come, it'll be fun, let me get your number."