This alternative seems to be free as long as the group is non-profit:

http://www.doorkeeperhq.com/

I suppose that any such service that facilitates group communications
and meetings needs to maintain a list of email addresses just as the
mailman program does for tclug.

Ed

On Fri, Mar 13, 2015 at 2:45 PM, Chuck Cole <cncole at earthlink.net> wrote:
> Meetup is a commercial firm that requires groups to pay group dues and
> submit their member lists for their advertising purposes.  Not private or
> self-governed.  Many may not want their names submitted to this commercial
> operation.  I'd like to hear of Penguins things, but not this way.
>
> Chuck
>
> ________________________________
> From: tclug-list-bounces at mn-linux.org
> [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of John Frisk
> Sent: Friday, March 13, 2015 6:56 AM
> To: TCLUG Mailing List; Ubuntu Minnesota Local Community Team;
> penguinsunbound-announce at lists.ties2.net
> Subject: [tclug-list] Penguins Unbound is on Meetup!
>
> Hello everyone,
> We have created a meetup site for Penguins Unbound.  This should enable us
> to better communicate group activities, meeting times, place availability,
> etc.  I hope all interested will join meetup  and RSVP for the March 21st
> 10AM meeting so I can get accurate attendance numbers.  This will also help
> on topic interest and meeting place requirements. (Future dates will be
> added once I get time).
> The site: http://www.meetup.com/PenguinsUnbound/
>
> I plan on talking a bit about piwigo (the open source gallery software)
> http://piwigo.org/
>
> David may present some material he's been working on about customer success
> in SaaS.
>
> I am waiting for confirmation on the place but will announce it once that is
> completed. More to come!
>
>
> _______________________________________________
> TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
> tclug-list at mn-linux.org
> http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>