OP... dude, come on.
Be thankful you're a bloke. You don't have to sit around and wait and hope that the person you like asks you out, why do you want to put yourself in that position? Dating is a meritocracy, no one is going to put it into your lap, and it's unfair to put it into her lap and then SHE has to gather the testicular fortitude to ask you out, when you're the one who put it on her?
She then has to worry constantly that you're going to come back to the shop and ask why she never called you back and that'll make her nervous as well.
It's unfair. Just gather your nuts, go to the shop when it's quiet, make a joke about, I dunno, milk or something, and then say "Hey, I'm interested. Do you want to grab a drink after your work or something?"
If she says yes, enjoy your date. No worrying or wondering. If she says no, smile, laugh, say "Ah, well, that's fair enough. Have a nice day" and then leave her alone for a while. Get it over and done with, rather than worry both of you for days about whether the other one has lost the number or will you be angry or whatever.
Anja Bech said:
Not really on topic, but is this some cultural thing I just don't understand? Why is it bad to give out your number but not to ask for somebody else's number? Or am I missing something completely? I'm just curious
It's rooted in sexist behaviours, so I suppose I'm gonna slap down a trigger warning.
It's bad because a man giving his phone number to a women is extremely passive; it forces the women to be the aggressor, and it makes the man look unwilling to put the effort in or weak or cowardly.
No one ever looks at a man and sighs "Wow, he's just so passive".
Romeo and Juliet was not "Hey, Juliet, here is my address, come stand under my window, I hope you get around to it".
People like it when the man is forward (polite, kind, willing to take "no" for an answer, but forward). Simply put, we expect a guy to grab his bullocks and act like a man.
From personal experience, it rarely works out except in the most passive and agonising situations for the bloke to be passive. In my experience in Asia and Europe, women expect a man to be... well, manly. Confident. Forward leading.
A man who nervously pushes a piece of paper into the girls hand and say "I-if you don't mind, you can call me" and then scampering away before getting rejected is just so... underwhelming.