What do you do while getting the car washed at a garage?

A little context. My car interiors have gotten really dirty. I have fabric seats and I don't use covers(Fk me, I know). I am considering getting a deep interior cleaning like a foam wash. My question is should I wait at the garage while the car is getting cleaned and dried? I'm anxious to leave the car at garage because of the possibility that they may replace original parts. Getting the cleaning done during service is not an option because the schedule is months away. Any suggestions?