Guessing they're estranged from their family of gluten-free health nuts, now they run a pasta/BBQ restaurant and are proud of their new lifestyle. Alternately, a waiter who snapped and couldn't take it anymore.
My guess was going to be millennial English teacher who got fed up with the new cafeteria menus and that all the good lunch spots close by are also hopping on the bandwagon. Because it's themed and meticulously laid out, like a perfectionist English teacher might do.