It’s way less awkward when it’s a roommate. When I’ve had roommates and it’s the first time having a particular person over, everyone just kinda knows and no one needs to say anything.

So it’s more like:

“…”

“Oh yeah, I just remembered I was supposed to meet someone, see ya later bro!”

But generally even that’s rare. Mostly it’s just “[yawn]… I think I’ll turn in, enjoy the rest of the movie, you two!”

Unless you’re sharing a bedroom with someone. But I’ve done this too, so someone has to sleep on the coach or whatever. So yeah that can be awkward. But still way less awkward than taking someone home to meet the parents when you just started dating.