It’s almost never open in this fashion!
But notice that it’s only open for a few weeks and open for very limited hours (5-9 PM)
I believe it only opens during spring break, as does El Pirata y el Perico.
All Ears does list Diamond Horseshoe, but only as a CS with a limited selection of 5 sandwiches.
Edit: I read in one place they’re only open for dinner and in another place that they’re also open for lunch between 11 and 4.
This is a western themed price fixed dinner $33.99/$16.99.
Not sure what lunch costs.