How to tell if a guy is gay/interested?

[ChadCoxRox]

OMG I just realized your are talking about the Subway restaurant and this guy is an employee!!!! I thought you were talking about the subway for transportation for some crazy multicultural reason. So alot of his behavior could be interpreted as loving his job, being a good salesman and wanting to impress his co-workers and customers. I understand the dynamics better so NOW my suggestion is to go there at the end of his shift! Be outside when he leaves and just say HI! Don't plan anything else to say or do, just Hi! Now here's the important part. If he says hello and what are your doing here you can just say you came to see him because you wanted to compliment him for doing such a great job. AND leave it at that!!! Let him take it anywhere else if he chooses. If he gives you a short visit and moves right on to leave take that as a sign to chill and keep visiting to eat continuing your study of him. Of course, if he's friendly and sociable you might find yourself telling him how shy you are and how very hard it was for you to wait to see him so you tell him you think he's very nice! That'll get you all the info you need to move forward one way or the other!!
Sorry I missed what you were saying before. Hope my idea is adaptable to your own choosing! BEST WISHES!