[HotDamnImAPhiMu]

I think it also matters if she has her own room, bathroom, etc.

I have two girlfriends who come for an overnight visit about once every other month - I just mention they're coming to my 3 roommates.

The girls sleep in my room, they use my bathroom, and honestly, we're out most of the time anyway.

I'm way too old to "ask permission" to have friends over, esp. when they're not going to be in the roommates' space. Knowing that's how I felt about *that*, I made sure to get a place where I'd have my own space. Kind of factors in with having a boyfriend spend the night, too - he wasn't interfering with my roommates' lives at all, so I didn't sweat having him over as often as I wanted.

But I admit it's a totally different situation if your 4 best friends are sucking up bathroom time, food, water, etc. - that can be a huge imposition if the roommate is finding herself stepping over your hungover roommates in the living room every morning, she goes to take a shower and there's no hot water, etc.