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.
https://www.youtube.com/watch?v=wL3O-UPMSLY Just remember, it has to start somewhere..