have you pay for your noodles??
If not, go somewhere else and eat.
It's not written rule, but i think those "self service" one, they
have a board there saying "self service", or they will tell you
when you order.
So, if they dont have the borad there, and they dont tell you, you
just leave and go someone else to eat.(since your friend already
finished eating, waiting for you to eat at the same coffee shop or
another coffee both need to wait for you.)
