If it were me, I'd talk to some diner or restaurant and see if they'd let you get a group together as a party/meeting once a month, and then put flyers up at dealerships and other places where you know scooters gather.
And don't get bummed out when 3 people show up..
It takes time and you have to remember, if everyone wanted to have a scooter club, there'd already be one.
Also remember that seldom do you get a group that rides the same. I ride with a group of 3 friends, and even though they're like brothers to me, I get frustrated when someone rides super slow... I got together with a group of Goldwing riders years ago, and halfway through the ride, I politely excused myself as we were riding 10mph below the speed limit. Cars were passing us.. I don't ride fast, but I do normally ride at least the speed limit or up to 10 or so above.
Anyway, I'd start a gathering and after the gathering have a ride to another spot as a gathering.
In my area, we have the Slimey Crud Run.. Twice a year a bunch of people on all shapes and forms of bikes (and scooters) gather, BS, kick tires, and then ride to another spot to do the same.
Just remember, it has to start somewhere..