It appears after many years being unsuccessful (late 90s, early 2000s) the latest people behind the idea have started to become amazingly successful: downtown outdoor summer concerts.
They started small and slowly and strategically grew the crowd.
From cover bands performing other bands hits to the actual band performing their own hits tonight outdoor under the night sky in the Grand Cities.
The hardcore fans will always know. You need lots of casual fans to fill 11,000 seats in a town of 60,000.
A lot more competition for entertainment dollars today than the 80s. Hockey games (minus a handful) weren't even televised in the 80s let alone massive high definition tvs.
Car washes, like storage units, are a "modern, easy" money making opportunities.
The style of the proposed rydell one posted above, was "recently" opened in Fargo also.
https://www.grandforksherald.com/business/restaurants-and-bars/4471145-Bully-Brew-moves-roastery-plans-open-house
They've done so well they've expanded into Fargo a few years ago.
Which puts it in the same range or as a larger employer than Cirrus aircraft in GF.
If not yet, it will be. PS Industries has continually expanded its shop in the Industrial park. And each time they think "this is it, we'll overbuild now and be set for a decade plus." Only to run out of room a few years later. I think this might be the fourth or fifth time they've added on to the building now.
Looks like Mayor Brown agrees with me.
https://www.grandforksherald.com/news/government-and-politics/4048082-Grand-Forks-mayor-says-hell-veto-32nd-Avenue-bridge-spending