Ways to say that there isn't enough room
If there's a number of people getting into the elevator and another person is coming up to get in, what might that person say or ask in this situation, regarding the fact that it's already packed and there isn't enough room in the elevator?
Can it be something like: I'm not sure I'll fit in there/ Is there enough room for all of us? / Is there room for one more?
What would you say in an everyday situation?
P.s. I'd also appreciate any corrections to my question itself if there are any mistakes.