Meetup has good facilities for organizing group members and events. It's easy to design your own page and set up events, even collecting money for them. Clubs who start using it need to be aware that it's really hard to stop using it, because if you stop paying fees, meetup will email everyone else in the group asking for another organizer to step up. So, if say you start a club called Harley Riders of LA County, but then decide to move to your own website, it's really difficult to take your meetup members with you. You need to email all the membership and then manually delete all group members, otherwise they will all keep receiving emails from Meetup that your club is closing down if a new organizer doesn't step up.