I played in a simul with Yermolinsky last April, my goal was to
not be the first one to lose

I made it to the middle of a 20 person field before resigning on the 26th move (would have been mated in a couple more - and there was nothing I could do about it) I lost in a Spanish line, don't recall the opening or line of the last man standing, I think that board went to 32 moves.
Good luck

and am interestead in your report of the festivities.