Five player groups? Why, in my day the DM didn't start turning people away from the open beginner's game until there were at least a dozen seats around the table! If you got killed and anyone was still waiting to play you had to give up your chair and join the queue while you rolled a new character, so you had people dropping in and out all night.
I won't even get in to how the DM added new "reinforcement" PCs during a dungeon run. Suffice to say some of the techniques were worthy of a Warner Brothers cartoon.
Funny how the OSR stuff never seems to resemble my actual childhood memories of gameplay very much...