I have met a very small number of other guys. As someone above said, it takes a while to build trust--and the amount of trust depends a lot on what the meeting structure is. A few times a lady we all knew needed some help moving, etc., and a few of us got together in a work party to help her. I have also net a few guys for dinner to riminess about a provider no longer with us. Even been to a wake for one well known DC woman. In all those cases it was a few people who all had the woman in common and she essentially could vouch for us to each other, or we had all seen and reviewed her, talked about her, etc. The key was there was nothing at all sexual or financial involved.
I have also been to two M&Gs put on by members of another board, and they had both men and women there. Food, drinks, good conversation, and a good chance to window shop. One had a very strict "no business conducted or discussed" policy, so even if LE hacked into our event there really was nothing there for them. The other one, organized by TER members several years ago, was far looser about that, and dates were openly arranged at the restaurant in semi-public. I left that one early because it was far to indiscrete. Nothing happened at that one, but not that much later there was a bust at one of their following M&Gs, not to my surprise.
If I felt comfortable with the rules and setup, I would go. They are low commitment and usually they have had some interesting people. For just a dinner get together with some folks from here, I would certainly do that if I were near the location when it happened (my definition of "near" is typically a four hour drive or so).