Welcome! I am new myself but been lurking for quite some time.
Its an amazing industry. I have been messing around in theaters and booths since I was 8 or so. Once the business is in your blood, your a theaterman/theaterwoman 'till the day you die!
Can't wait to read your contributions to the forum!
Tony
P.S.
Where was this walk in/drive in? The reason I ask is my late friend and her husband had one in Denver from the 50's thru the 70's that they built and I was under the impression that is was the only one of its kind. This was quite a place that even stayed open in the awful Colorado winters. They checked out heaters that plugged into the speaker polls.