She's doing you a huge favor. This way, you know to move on. Would you rather she give you her number being polite and you waste time calling and texting her only to have her flake in one way or another? I don't know if O.P. is a troll, but this is actually a pretty important topic.
Places where this is more likely to happen in my experience:
D.C.
The South
The Midwest
Mexico
Places where it is less likely to happen:
Southern California
Las Vegas
Colombia
Argentina
New York/New Jersey
Coincidentally, which group of places tends to have better girls?
Places where this is more likely to happen in my experience:
D.C.
The South
The Midwest
Mexico
Places where it is less likely to happen:
Southern California
Las Vegas
Colombia
Argentina
New York/New Jersey
Coincidentally, which group of places tends to have better girls?