Quicksand Fans

back in 2016 they opened a pop-up Gata mud bar in Tokyo where you enjoy beer & slimy clay - looks great but don't know if it's still there?
https://www.youtube.com/watch?v=e7yWe-A7448

Sounds like an explanation of the phrase "Here's mud in your eye."

A pretty cursory search on Google Maps doesn't reveal any Gata bar in the Saga Prefecture, sadly -- even searching the kanji (潟) for gata (kata) doesn't yield any results.

The "Pop-Up" style of store/attraction is fairly common over there, with the main idea that the store/location isn't there for very long. Seems mostly like it was a novelty attraction for a short while, and then it vanished.
This video was from 4 years ago now, so it's probably long gone...