I know it's tempting to use the Meetup discussion list/message board-- but please consider that 1100 people (and more each day) get every email that gets sent. There is no way to be selective. That is why we have several different lists on Riseup-- one just for our own events, which has a gazillion subscribers, a discussion list for those who want, and the dumpsterdive list for those who want to organize off-calendar dumpster diving in a decentralized way. When you use that list, you reach JUST the people you want to reach without bothering anyone else-- subscribe and try it! To see all your options on riseup, go to lists.riseup.net and type in the keyword freegannyc.