We're told that the rooms are intended to draw on the familiar sensations of being at home. That means the dining room is supposed to feel "rigid and formal." This is accomplished by sticking a giant cactus in the middle of eight tiny orange nylon tables, just like all those formal family dinners you had as a kid.
"It's just like when we would go to Nana's and worship the cactus god."
Note that the goal of Tink's House is to create an intimate, communal dining experience that encourages conversation with total strangers, which is precisely what everyone wants when dining out. They claim it's "not supposed to be awkward," which adds further evidence to our theory that the designers have never actually been to a restaurant before. At least their pay-what-you-want scheme means you'll get your money's worth.