its unprofessional to hit on someone while theyre working at their job

I’ve been on the receiving end. I try to avoid all that at work, I refuse to flirt with or date coworkers as a rule.

That's very unprofessional. People need to keep their work life separate from their personal life.

I work in a pub so it kind of comes with the territory

No. Even when I was young and dumb, I wasn't dumb enough to think that a girl I was interested in would appreciate being bothered while trying to work.

I can't even bring myself to hit on people in public let alone while they are working. I've been flirted with by people working though and didn't realize it until it was way too late though...

i wouldn't