• Step 1 : Invite the girl to play pool or foosball, say you're pretty bad at it
  • Step 2: Bet a slice of pizza, a froyo or anything that you could buy from a business nearby. Say something along the lines of "Alright, let's make it fun, let's bet an ice cream!".
  • Step 3: Talk to her while playing
  • Step 4: Win the game but not by much (for more teasing)
  • Step 5: "Great game, you owe me an icecream, I know this place around the corner, let's go!".

And now you're on a icecream date at night.