Gary Phillips said:
I guess what I am asking is, would it be frowned up to email a Super and say, 'Hey, I would be interested in working for you if an opportunity arises, here is my resume.'
Personally, I think the same ethics apply. The assistant at your hypothetical course is a human being too. It's really about whether or not another person currently is holding the job. When you're in these dilemmas ask yourself "Am I thinking solely about myself or am I considering the other guy, too?"
You could ask if they have any open positions. But if you are targeting a specific, filled position, I think the same level of professional courtesy applies.