How To Deal With Roommate Wanting Guys Over

I'm a freshman in college who shares a double person dorm with my roommate. My roommate is rather outgoing and has already had guys come over to the dorm. I'm out a lot and will give her specified times so that she can do whatever she wants to when I'm out. Unfortunately, she tends to drunk sleep with dudes rather late in the night. Ya know, the times when I'm in the dorm. I have left once already so she could sleep with a guy in a dorm, but I don't have tons of friends (I'm working on it) and I don't want to bother the few I have. This Friday she wants a dude over, and I told her that if she wants to sleep with him, she should look to see if his place is open and other options before immediately going to the dorm because I don't want to be kicked out every time she's horny. I'm working on Saturday from 5 pm - likely 12 am and suggested she bring him over then, but she says I'll be coming home "early". Am I unreasonable for asking her to try and look other places before bringing him to the dorm? I don't wanna seem like the lame roommate.

Edit: Wanna specify rq that she wants me to leave the dorm. Not that she'll sleep w the dude when I'm in the dorm.