[EricH]

My team's rules were: Follow the school Code of Conduct. Pretty much that meant no PDA's. Pretty much. Also a dress code (T-shirts are approved) and follow the team leaders' decisions. And with the school vice principal often along on our trips...

As for having a team rule if the team doesn't have one, definitely have at least a guideline. All appropriate school codes of conduct should be reviewed when you form the guideline; if you don't have something like that, sponsoring organizations' codes should be followed.

Hanging outside: That's just fine. Professional companies have stuff like that fairly often, offsite (or on, in cases of, say, engineering competitions), in some cases.

Sun bathing outside is probably across the line. At least, it's across mine.

Also, if you're supposed to be doing something else, neither hanging out nor other things are appropriate. (Lunch break doesn't count as something else... until you stretch it deliberately to a game of Ultimate or something like that.)