Ketchup on eggs is extremely common (at least in NY). I would never do such a thing though.

This post reminds me of this blog. While it's not about strange combos, there is some pretty gross stuff there. About halfway down there is some crazy Mexican corn with an infection. I actually found and bought that a couple nights ago. One would think it's cheap, but a small 7 oz. can cost me $4! I may try it this weekend if I'm brave enough just to see what it's all about.

Fried chicken with waffles and maple syrup seems weird to me, but there are a few places in the city that specialize in it.