i remember being a little kid, renting UFC 5,6,7 era tapes from the Akron Public Library.
Ken shamrock and others. if I recall - they used to fight 8 guys a night... if you win, you advance.
So the winner would fight 3 times in one night. And they always mismatched people. One fight had this little karate guy break the nose of a giant sumo in like 5 seconds.