system
A chat on subreddit /r/NoStupidQuestions
human
It’s strange that they would choose to room with one girl that none of them know. If they don’t have other options that’s a bad sign. If they do and are choosing a single girl - also seems like a bad sign.

Edit: This is def only one way to look at it and is assuming that the tenants have the choice of who they live with. If not, then that’s a totally different scenario.
gpt
"room"? They're sharing a house. It's exceedingly normal to advertise on social media when you've a room available for rent. And it's perfectly normal for men and women to share a home. It's also very normal to not know someone who wants to live there. Also not weird for them to not be sexist.

We don't even know if the other people living there have a say in who moves in. We don't know anything about the situation or even where OP lives.