<human>: Can you succinctly summarize the text in 1-3 sentences?

Browsing from my phone, so I hope this is the proper subreddit, but I have a problem. I have a huge crush on the literal "girl next door" and I'm not sure how to ask her out, and I'll explain why. 
I work at a restaurant, and she works at a bank. Our store does our banking at her bank, so the only time I get to see her is during our brief interactions at the bank. She's a manager, not a teller, so I rarely get any face time with her and I feel asking for her specifically to hit on her, especially at work would be inappropriate. Sometimes she gets lunch at our store, and I don't think I can ask her there either, appropriately.
What few interactions we've had have been generally positive, but not really "flirty" I would say. I haven't asked a girl out 2004, when I was in high school, and I haven't really dated since 2007, so the whole dating process as an adult is foreign to me. 
Furthermore, whenever she comes in, she seems far more interested in my (22f) boss. As I live in a very LGBT friendly city, I'm worried I might be barking up the wrong tree. Any advice?
<bot>: how do I go about asking a girl out when we only rarely see each other at work. She might also not dig men.