Yes meetup is a great tool to find other riders. However, read the group intro before you sign up. Some groups are very particular about members and what they ride. If "club" or "dues" or "patch" are mentioned, they are more likely very restrictive. Some won't allow members to join other clubs; you must ride with them exclusively.Meetup is a good tool... And if you can't find a local group, just create one... Meetup will announce your new group to everyone who is in your area who has expressed an interest in motorcycles.
You might consider not "limiting" your group to just Burgmans or scooters. Our riding club we started via meetup has everything from Burgman to Harley to adventure/touring to super sport riders to my wife's Burgman with a trike conversion...
There is no animosity between any type of bike, but there is sometimes some good hearted ribbing, especially of my wife's Burgman trike.
You're absolutely correct. If they start their own group, I highly suggest opening it up to all types of bikes and rides. I was referring to already established groups.@Liamjs
I was thinking more if the OP started a meetup group... He would get more riders if he didn't limit it just to Burgman riders.
He could emphasize what kind of trips (certain number of hours for typical ride, leisurely or spirited riding etc... We've found that for about every 4 who actually join, you'll get 1 person who becomes a "regular" that goes on most of the rides.