I have experienced this with the dreaded Cinco De Mayo lunches at a former workplace. It was very, extremely, awfully cringe-y. They even had a “toss the tortilla chip into the sombrero” game at every lunch table — with real sombreros. No one Mexican appeared to be on staff but I couldn’t stomach the whole situation at all. Just offensive. If you cater lunch weekly for staff, you can serve tacos whenever you want; no need to wait until Cinco De Mayo to do so.