Sexual vibes from customers at work

I work at a Zaxby's fast food restauraunt. Most people I meet say I am a very warm and kind individual, so people feel comfortable around me. At work I especially try to be nice to customers so they will have a good memory about their visit. There have been several times where people both men and women have come through and hit on me. I am especially uncomfortable when I am cleaning the restrooms and a customer does something unappropriate for example (I stepped into the mens restroom to sweep the floor and when I went to leave a guy at the urinal wa facing me holding his pants open, I will be cleaning the womens room and multiple times women have stepped in and when I told them I would step out for them, they urge me to stay. I know the second one might not be much but most women dont object to me leaving the restroom when they have to take care of business. There are several cases I could cite but that would take an hour to read if I did, anyways I have never experienced these types of behavior outside of the restauraunt world, Would most people consider these actions normal? or could it posibly be that society looks at me different while at work and thus treat me different than they would if I were in regular clothes. I mean, there was even one night when an old man peeked into my stall while I was using the restroom. Some people are just crazy, I dont understand