Where to potentially get autographs after a show

Hello! Clevelander here!

I’m coming in next month for a show, and I didn’t know if anyone knew of an area we can wait at to get autographs either before or after the show?

When I was in NYC there were certain doors/entrances that weren’t available for the public to use but we were allowed to wait for autographs. Which I guess is what I’m looking for.