Dear Antony,
If you took the subway or the bus to work, you would likely see impure, suggestive photos of women advertised, or immodest women in person. Lots of people have jobs connected to something anti Catholic--probably most do except farmers and mothers. The world, the flesh and the devil are everywhere to tempt the souls of men. Don't listen to the devil trying to make you quit your job, unless you have a nice trust fund or an otherwise secure future. We have read these types of concerns by young men countless times here, and this type of thinking is just not healthy. You are not condoning prostitution by delivering pizza near a strip club.
You are just delivering pizza and now you know exactly where and when to avert your eyes like your Mom taught you. You have your Brown Scapular on and your rosary in your hands, so stay employed and lead a productive life. :cheers: