When Space Mt was sponsored by RCA my family used to be able to get in there and it had free food and drinks for employees. That's also where we went to make all of our dining reservations for that week. I can't believe there was ever a time that you could make all your ADRs when you got down to disney and not 90 days out!
When GE sponsored Horizons there was also a VIP employee lounge where you could do the same. You also didn't have to wait on line to get on the ride. They would take you through the back way and just load you on a car before everyone else.
I also want to say when GE used to host one of the Fireworks shows (Fantasmic?! I think it was at MGM)... there's also a GE employee lounge with the same amenities too.
The only reason why I remember any of this is I just remember sitting on the big leather couches in the lounges and drinking soda while watching my dad make ADRs at the desk.

And thinking it was awesome for no wait for Horizons. I'll have to see if I can dig and find photos.