We eat mostly on TV Trays in the den.
We have a nice set of oak folding TV Trays that hang on their original rack in
the diningroom.
The original rack is double sided and, for years, has to lean against the wall.
Also you have to lean the rack away from the wall to place trays on the back side.

I saw a serving tray rack at On The Border, which gave me this idea.
A rack, attached to the wall, that holds all 4 TV trays, and is easily accessable.