The halls of the Rio Pavilion are always packed during the WSOP, but a different kind of commotion is unfolding just outside Convention Way on the Rio's main casino floor.
The Rio has set up a gargantuan island of slot machines on the edge of the casino floor for the Three Slot Series tournament, and the area has been packed pretty much nonstop for the last four days.
The scene is chaotic, merciless to the unsuspecting traveler trying to navigate from the casino to the Rio Pavilion.
Getting through the corridor is no easy task, as the slot tourney railbirds are usually at least three deep all around the island during tournament time.
Imagine the ESPN feature table but without the spectator bleachers, and make it about five times longer with 100 people playing slots instead of nine playing poker.
Each player gets 10 minutes to slam away for as many credits as they can win, and the contestants are instructed to never let the reels stop.
It's akin to a live version of a Full Tilt Rush Poker tournament, except with slot machines and lots of vociferous railbirds.
We took a look at the Three Slot Series leader board during an intermission and we know that 600 players are getting paid, and the first-place prize is a cool $30k.
The leader board itself is a massive structure of bulletin boards and data sheets, with the number of total entrants for the event appearing to be upwards of 13,000 players.
Will ESPN ever pick up the World Series of Slots?