Once a year a big national newspaper, Hobiecat/Nacra, and a sailing club organize a special day where people can get a ride on a cat.
They have to pay €25 and get a sandwich and a ride on one of the cats.
http://translate.google.nl/translat...ttp%3A%2F%2Fwww.catamaranopstapdag.nl%2F

I think JC did one of these days as well.
It usually attracts about 100 people (dont know exact numbers) and know of a few people who bought a boat or started crewing since visiting it.