One of my old schools, when they had a similar issue, changed their intermediate class to an intermediate/advanced class. They explained to the advanced students that they can come to the class, but that they'd be working on lower level material to improve it. Not everyone is interested in doing that, so you'd get a few extra students in the intermediate class which lets them have more partners (and also more people to help them), while not becoming overcrowded.If you have 1700 sqft mat space, you should be able to have around 35 students per class (50sqft per person per class) without it being very crowded. If each student is attending an average of 3 classes per week, and you have 24 classes per week, the facility should be able to accommodate 280 students.
Of course, that assumes that every one of your classes are maxed out, which is unlikely. I know right now, for us, our intermediate classes are practically empty because we didn't have a lot of new signups last year, but our advanced classes (people who stuck with us through covid) and beginner classes are very busy. So it's a bit lumpy, but we can't just drop the intermediate classes from the schedule lol.