I don’t disagree about the benefits of integration and improvements to meet-up threads, but opt out is a fairly obnoxious way to manage anything. I don’t see anything in those other benefits that requires (or even is improved by) opt out. I may be missing something though and am interested to hear why opt out improves them.
Any new arrangement should not be confined to one’s profile location—consider travellers wanting to see if there’s a meet-up coinciding with their travel.
Can you confirm that address? It looks like commercial business space and is not somewhere I would expect for a meet-up. (Unless you a civil engineer, a glass distributor or a website designer… :) All of which are interesting but still not what I’d expect for meet-up space.)