Let's say both of you noticed each other and made eye contact. Then let's say at least one of the two of you has the courage to introduce yourself and exchange names, then speak for only 5 more minutes.
You don't know if you will see each other again, but the most courageous one asks for your number. Would you give it, after only 5 minutes of speaking?
Most Helpful Girl
Probably, this is all assuming we find the other person interesting and not creepy0