In my city.
We have two cat only clubs. Both sail offshore, one has an acre or so of grass to rig up on and a no wave beach to sail out from. The other is beach based with waves. There are three other ocean based clubs in the metro area.. One has at least one cat class not sure about the other two. Both have sand/grass rigging areas. All are wave free. Then there are 3 mixed clubs on the river. One has around 3 acres of lawn... All have hot showers and cold cheap beer. The river also has 2 skiff clubs and 6 skiff/cruiser clubs.

In addition there are 4 clubs within what I call the greater metro area. Its been some time since I visited these but back then they all had cats. In addition most regional clubs have a cat fleet.