Practice Green Etiquette?

[the_scalp]

Hey Golf Forum.

I live a few blocks from Finkbine golf course in Iowa City -- the University's golf course. I golf there about once a week (18$ twilight rate!).

Recently I've just been going over there every couple of days to use the practice greens (there's five of them). I have several questions about etiquette:

1) Is it okay for me to use the practice greens even though I'm not a member of the course? I am a member of the University community.

2) If all the holes (10 or so spread out among the greens) is it okay to share a hole with someone (if I ask first)?

3) Some of the green seem more torn up than others -- I suspect they're used for chipping practice mainly. Is there a common way to know at nicer courses which greens you're supposed to chip on and which you're supposed to putt on?

4) I'm assuming I'm supposed to rake the sandtraps and repair my ball marks just as if I were playing a round, this is correct? Others don't seem to bother.

Thanks