Hello Keith and Welcome to AW.org!
As far as I know there is only this national/global group, nothing specifically "regional". It's just a matter if a person with a collection, large or small, wants to open his/her home up and host a "wash-in", washer party, what ever you'd like to call it.
I see you signed up in June. If you were "lurking" prior to that you may have seen a couple threads about wash-ins, including one I hosted back in April (and smaller gathering in Pittsburg in June). While there are a handful of locals here within a 2 hour drive, the majority of the attendees for the April wash-in traveled from all over the country (and Canada) to be here. I am still in awe that so many came!
If by chance you didn't see it, the link below is the thread about the April Wash-In.
Over the last 2 - 3 years there have been Wash-In's or washer related parties in Los Angeles, Portland, Minneapolis, Massachusetts, Pittsburg, Baltimore / Wash D.C and New Jersey (Please forgive if I've forgotten any).
Enjoy!
Kevin
WOW... this little thing that started out as Jon (Jetcone) coming by to see my collection.... turned into a full blown WASH-IN with 50 people coming from all over the US and Canada!!!! I want to thank EVERYONE who took the time to make their way to my house for the wash-in! THANK YOU...
www.automaticwasher.org