My res unit has had a team in the Base Intersection league for the last 5 years. Anyone on Cl A or Cl B under 180 days needs to buy a 10$ sports card from the Gym, to be covered by insurance. New players every year buy their jerseys, that way we can keep them instead of having to sign for them from SQ. We've never had a problem of people showing up for hockey and not showing up for parade nights, in fact one year when a game was on a Thursday night, the unit was ordered down to the arena to watch our game, while the hockey players got off an hour before hand to get ready. So it definately helps if your CoC supports the team. Also, we do not sign in for a half day Cl A for the hockey games, so it is a military-sanctioned volunteer event, which allows us to have just people that want to play.