Yep, it is a real blast!
I have been doing it for years, 2 v 3, 3 v 5, 4 v 8, 6 v 12, 8 v 16, ......
I was trying to think what the biggest one was.
The biggest lessons are that there is a tendency (as Sh'te) to attack your fellow Sh'te by accident, instead of the Uke(s)! Friendly Fire!
As Uke you tend to attack with grabs, not strikes!