Yamasaki promotions classes are pretty big and usually have an open mat. The 60th Anniversary was a huge class.

Here's a video from an early one with 'just' around 150 people: https://www.youtube.com/w[...]jaCsFYEKDY I think we beat that record more than a few times as some of the big camps in Germany had close to 300 people :) Great vibes, highly recommend it!

Yamasaki promotions classes are pretty big and usually have an open mat. The 60th Anniversary was a huge class.

All I can read with the font on picture is YAMASAKI GOTH ANNIVERSARY and it paints a picture in my mind that doesn't match the actual picture at all :(

All I can read with the font on picture is YAMASAKI GOTH ANNIVERSARY and it paints a picture in my mind that doesn't match the actual picture at all :(

We have an open mat called Big Jitsu here in Houston. Only grapplers 200 lbs and up, scale at the door. We have had over 10000 lbs at a few of them. Or did you mean actual people?

Biggest one I've been to would be one of the Heidelcamp open mats Christian mentioned, so something like 300 people. I get quite a few at my GrappleThons (which is basically a big open mat for 24hrs, with people getting sponsored to roll in order to raise money for charity), but while that might reach triple figures over the course of the 24 hours, it wouldn't be more than about 50 at any one time. Naturally I only rolled with something like 5 or 6 people out of that 300, 100% of whom I either already knew well or had at least chatted to a lot over the previous week. :P

That sounds like a ton of fun! Cool video. It's been 6 years since that, we can make an updated worlds largest open mat video!

I'm in there somewhere, in that wonderful pile of chaos. Kind of makes me sad it'll be a LONG time before we can have those massive mat moshpits again.