I think the last two comments do a grave injustice to the advertising geniuses at Denny's. Paraphrasing from their website:
"At some point Baconalia sizzled out. Bacon historians contend that this could have been the result of a simple spelling mistake. Baconalia, the celebration of swine was misspelled "Bacchanalia", and confused with the Roman celebration of wine, which people then began to mistake for the original feast."
It's things like this that make me regret my career choices. Instead of co-authoring a book that causes me to receive e-mail from earnest pharmacokineticists in Uganda and Sweden, I could have made a real contribution by going into advertising and coining words like "Baconalia". Which is sheer bloody genius, I think you'll agree.