[Tagging] Model railroad exhibition/show

[Tijmen Stam]

Is there a proper tag for a model railroad layout open to the public?
I am talking about small-scale, non-ridable layouts inside a building, 
and am thinking about a leisure= tag on a node.
I explicitly do NOT want to layout the entire rail.

Examples:
http://www.train-miniature-gaillacois.fr/crbst_9.html (very outdated site)
http://www.miniatur-wunderland.com/ (which is tagged with the generic 
tourism=attraction)

Tijmen