Residences guest visits - international student

I'm an incoming international graduate student currently looking for housing options, and was exploring studio/ efficiency room. I saw this rule of max 3 nights stay in a 7-day period from visitors (who supposedly need to be checked in) on campus residences, and was looking to understand how strict this rule really is. Can someone help me out?

I will most likely have occasional visits from my gf, but may also have friends/family visiting as well. They are all coming from Europe, and therefore it's unrealistic to assume they will just stay for 3 nights, given the ticket prices (probably stay for a week). Moreover, how okay is it to host more than one person at a time (maybe 2 or 3)?

Or should I just look for something outside campus? It seems much more expensive.