Apartment pool restrictions

Now that pool season is drawing to a close...

If you live in an apartment complex with a pool, I'm curious how your building regulates access to the pool. I'm thinking about things like:

* Pool hours * Is the pool open without a lifeguard present? * Does the building use a pool pass system? * Does the building restrict guests? * Does a lifeguard/security/someone else enforce things like pool passes, visitor restrictions, etc?

Our building is super, over-the-top intense about all this, if you couldn't guess. My friends who have pools with their buildings seem to have a much more relaxed setup. I'm curious what the norm is.