I'm going to be honest. This is my story. It happened about 2 weeks ago on a Sunday. I signed up to a new meetup group called "Hermits in -name of hometown-" which was dedicated to guitars, music and all-round jamming. I rocked up to the place knowing that it was probably going to be difficult finding them considering I hadn't been there before, but I went anyway...after all, I could always message the mods.
I send the organizer a message and about an hour and a half passes and ...no response. At this point I resorted to the "caveman approach" which meant I had to walk around the entire park looking for anyone who looked remotely like the guy in the profile picture, and asking them if they were "X". I did not find him.
At this point I pretty much asked these two random guys sitting on a small hill if they knew the location of the picture in the meetup group's gallery. They both said no. We spent the next few minutes contemplating where they would actually be. They were both exchange students: one was from South America and one was from Japan. I knew that this would be a great opportunity to sing along with some people, because I hated the thought of wasting my Sunday on a bunch of blowouts who never bothered to contact me. So I tried to weasel my way into it by asking them what he was playing and if he knew any songs by X. The asian guy started playing them and seemed to be pretty keen on playing whatever song I suggested. The South American guy, however, seemed a bit bothered that I was there.
I pretty much spent the next 4 hours singing and playing music with these two guys I'd never even met, and I wasn't bothered because I just wanted to jam that badly that I threw all my perceived dignity out the window.
I hung out with the asian guy this weekend and we learned a few songs together. He's still learning English, and I'm still trying to teach him how to speak conversationally, but song-wise he seems pretty adept. He is also a fantastic guitarist. 10/10 would jam with again.
*TL;DR: * Meetup.com is overrated - people can be incredibly flaky.