Meetup.com
Meetup.com is a social gathering tool that lets like-minded people set up in-person activity groups through its online interface. Sign up with an email address in order to RSVP to meetups in your area.
How to remove your information from Meetup.com
If you’ve found your name on meetup.com, chances are you’re using your full name on your profile page. To use a screen name, your initials, or other more anonymous identifier, log into your meetup.com account, click the account settings link at the top of the page, and edit the field with your name in it.