Hello! I have experience on some cashiers.
I got one number like this.
I asked how she was. Then ended the conversation smiling and left store.
Outside I realized that I could ask her phone number. Going back 30 minutes later.
I didn't buy anything. I said, "I forgot something".
Then I blurted it out , with alpha tone of voice:
"Give me your number!"
She was reluctant and gave me the "I have a boyfriend" line. I asked "are you sure you don't want to give it to me" as I knew I was alpha. She gave me the number.
I never called though. I saw her couple weeks later and said "I suppose you are on my friends zone now" She said, "Yes." So basically I put her on my friends zone
Many cashiers seem to like me. When I talk to them I ask how they are. I need to get some variety into it and try to flirt some or something. Last time I had a short conversation I asked how she was so good with remembering which item was which.
One time a grocery store was closing and I asked the cashier girl what she was up to after work is over. She said she was going to home, smiling. I stopped the interaction there. I didn't have courage to continue it and ask her for a instant date. I think instant dates are excellent options if the store is closing soon.
There is one organic food store cashier girl to whom I have a mutual attraction. I will keep the conversation going next time I go there. Last time it was flirty and fun, but I ended it pretty hastily to prevent awkwardness.