I got the number of a girl at a burger joint today. I asked for it at the end of my order, after making the usual "Hey how's your day" small talk. She was hesitant but gave me it (though it could have been fake), but really I don't know her at all aside from her name.

Typical TRP texting suggests making it known your time is valuable ("I'm doing x at z pm, join me") but is that really possible with so little rapport?