A large table that is home to scale model trains as part of the hobby of model railroading. Commonly known as a layout. Model Railroads can vary in realism from fictional (freelanced) to prototypical, and size from a simple 4x8 plywood sheet to a "basement empire". Often confused for simply running toy trains in a circle, or oval. (which it can include)
Bob: Hey Dave, you got any hobbies?
Dave: I have a model railroad.
Bob: So, you run toy trains? Dude, your 35!