An umbrella term for the many restaurants that sell greasy slightly upgraded diner food. see: Chili's, Applebee’s, TGI Fridays, Outback Steakhouse, Spoons, Ect. They are notorious for being impressive on the first visit, then slowly the portions shrink, ingredients get cheaper, service dwindles, until eventually it just sucks.
Term was used as a fictional commercial restaurant on the Sealab 2021 episode Tinfins.
Grizzlebees family bar & grill, you'll wish you had less fun!