We try to have a yearly presence at the Arcon gaming con in Oslo. Sadly, the once large (by norwegian standards-1300 people or so) has slumped somewhat down to around 600 people (they blame computer games, but I think the fact that they had to drop their film programme and a few other really popular events might have more to do with it). Even so, there is a pretty decent turnout every year.
This year, with a Steampunk theme to the con, we set up 8 demo/freeplay tables, with a train theme (the tracks run all the way down the table line, and the train moved 12" every 10-15 minutes. Get hit by the train and get slammed d6+3 inches away and suffer a POW20 hit). The promo name was "Iron Kingdoms Express" and the concept was a disneyland-like ride through different areas of the IK...not all of which have railways in the setting.
The length of the track and the first table, made up to represent a station on the Bainsmarket-Point Bourne line.
The winter table - somewhere north of Tverkutsk
The trench table - somewhere between Northguard and Ravensguard
Generic forest table, meant to represent the Gnarls