Not only doors, I’d open the windows too on Cessna aircraft.
I would always brief it before hand, the what if scenario, at a non towered airport takeoff with one or both windows open.
Then prior to solo pop mine unexpectedly.
Bring Florida in the summertime we’d mostly do slow flight excercises with the windows open anyway.
Even though technically there isn’t one I’d use Vfe as max window open speed.