This was just set up as a test to see if Meetup would correct the way their map pages interact with Google Maps. This is not really a meetup, but you may RSVP and look at the site here to see whatsup. OK? I moved the date back again and again because Meetup support took over four months and just now (June 4, 2014) has it fixed.
I contacted Meetup Support again. Wow! Got a good reply on May 22nd and there was a partial fix already on the 23rd.
Now on June 4th:
THANK YOU Andrea Murphy, Community Manager, Meetup HQ! I just went on another Meetup and the map worked the way it used to. AND, this map now works correctly, both with the old version of Google Maps and the new version of Google Maps. Thank you, thank you.
We now again have the familiar GREEN ARROW pointing to the proper location (in the older version of Google Maps). The new version does not use the Green Arrow, but does point to the correct place. Yes, it is different, but I am now sure it will also be useful for us.
This will stay up 'till the 17th and I will mark all of you that replied that you were "going" on here as having attended the meetup. :-)