Matt's Bar a bit further up Cedar claims to have invented the Juicy Lucy. And, since I'll be in that part of the world next week, I'll have to get me one.
We went to 5-8 Club. Hands down best burger Ive ever eaten. Nothing fancy just burger and pickles is all it comes with. Well worth the go. Ive heard of Matt's and Im sure they are just as good or better.