I woke this morning with this memory from my youth, and feel it might be helpful in some way.
When I was 16, I was working two summer jobs, one to help my family and the other to save for a car. One of the jobs was at a restaurant working nights, in an area with shops, a couple pubs and a theater. When the pubs closed on the weekends the people would come in to eat. My first weekend working, after the pubs closed, the entire place filled up with gay men. I was mortified I had never seen so many gay people in my life and my first thought was to run out of the place to get away from this evil that occupied every table and chair. I couldn't imagine getting close enough to any one of these men to take an order, or serve their food. I had been taught from a very young age to fear evil and hate the sinner, but we know as followers of Christ, we are to turn away from evil and hate the sin, not the sinner.
I was in the same situation you are, I couldn't quit my job, so I made the decision to do what my employer hired me to do and went to take orders. Not one of these men were rude or disrespectful in any way. Neither were they loud, messy or obnoxious. They tipped better than most as well. The gay didn't rub off on me, and being kind in my service to them didn't affect me in any negative way, in fact it made me question the truth of what I'd been taught. I don't feel I did anything God would not approve of, by being kind and respectful to other sinners.