I think they're referring to people who set up camp at a table or two at these all you can eat buffets.
They typically sit at a larger area (normally next to the television), and are usually accompanied by children or infants.
They stay for hours on end and will occasionally get up to grab more food.
I don't see how anyone can do that to themselves. Imagine sitting at a restaurant all day watching daytime television and eating food, my ass is hurting just thinking about it.
I love a good buffet and can put one out of business with the amount I eat at one, but I can't see myself being at a table or in a booth for more than an hour.
I recently found a channel with the same production format as SummoningSalt. The name of the channel is 'Abyssoft'
I watched a pretty lengthy FF7 speedrun progression video and got immediately hooked!
https://youtube.com/@Abyssoft?si=leaNxxNFjRYLKtld