Hi, I'm Greg. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
Unfortunately, I wish I had better news on this but there would not be a source for that information readily in a central location. You are correct that most major cities have their own local promtions but I am unable to find a link to all of them together. This question is still open to all the other experts as well as I continue to search my databases.
great. I'll look for the response.