And now let's be generic. The Music Club And Cafe. The Restaurant in the Hotel. This effect is still somewhat true when the theme of the restaurant does have a food connection, but the taste of the food is not the focus. A subset of both of the above categories is the chain restaurant.
Chain restaurants think of the theme first, then they work out the food.
There is such a thing as a good chain. But even the best of them are to single-location restaurants what a print is to an original artwork. You cannot detect the soul. The best chains cover this up with what is beyond question the finest marketing work in the restaurant industry. That shows up primarily in the theme itself, as well as in the premises.