can sit on a v4 at GPIf the manufacturers don't have an official booth, sometimes a local dealer will step up and bring some of their lineup to the show.
This last show a couple of weeks ago there wasn't an official Ducati booth, but Ducati Toronto did set up a booth and they brought about 10-15 bikes from their inventory available to peruse. Although I don't think they let you sit on some of the high $ models like the Panigale V4.
I don't think they you sit on those at the dealership either.