Karaoke routine or opener
During karaoke, bust out your cell phone and Shazam it.
Outcomes:
1) Bet your target if shazam will register the song or how many tries it’ll take
2) Use it as a punishment or reward when she sings
3) Use it as an opener “I shazam every song and you’re the first singer that it registered”
If you frequent the karaoke bar, you will learn how the acoustics are and how aiming your cell phone towards or away will help or prevent Shazam from registering the song. Furthermore, your cell phone is already out, if you're getting IOIs, no reason not to get her #.