The condition in which you end up with someone in their room (usually during a party where alcohol is involved) and some form of sex is expected to occur. Before you end up in the room loop, you think it's a good idea to have sex with this person, but when you get there you realize how wrong you were. In this no-win situation one of three things happens:

1. You make up a lame excuse about your drunk friend and leave ASAP
2. You start to have sex, change your mind, and leave. Usually results in you earning a reputation as a blue baller
3. You have sex with them because you don't want to piss anybody off and feel like shit about yourself the morning after

You usually have about five seconds to make up an excuse to get out of the situation before it becomes socially awkward to do so later.

Even if you break out of the loop in the first few seconds, you will usually be asked to leave the party.
Christina didn't realize she had gotten herself in the room loop until it was too late to break out of it and ended up having terrible drunken sex with a guy who didn't know her name.

"I almost got stuck in the room loop last night, but I got out of it by pretending my friend had texted me and needed me to buy her a pregnancy test"
by Whompy Geeb January 17, 2012
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