Here's the "Problem" with cats and yacht clubs. Cats do take up more storage space, pure and simple. I was at a Laser club in Sydney a couple weeks ago, they had about 60 Lasers all stored on racks, floor to ceiling, inside a barn. They had a very small beach to launch from, but they got 50 Lasers out racing and told me that was pretty typical for a Saturday club race.
As I looked around the club grounds, tightly packed in between some other businesses and across the street from a public park, I didn't see ANYPLACE where a -single- cat could have been stored, mast up, let alone several cats.
Even if someone had shown up with a cat on a trailer, he would have taken up the grassy space of 3 Lasers, just putting the thing together.
So there is no doubt that the extra space a Catamaran needs for storage (especially mast up) has something to do with any Yacht Club's acceptance of them.
You can't stack 60 cats inside a small club shed, or rig 60 cats up in a small yard, or launch them all off a small, narrow beach.