There is a war in Philly as to who makes the best cheese steak. The two heavyweights are Geno's and Pat's. They are literally a stone's throw away from each other, opposite corners of an intersection. Geno's has a much higher public profile (compare websites) as does it's owner, the outspoken Joey Vento. There is a "right" way to order your cheese steak too. I don't know all the details but I do recall that you are supposed to say "wid" if you want it "with onions" and you just say "whiz" for Cheeze Whiz. As I recall, the staff will poke fun at you if you order like a newbie.

I've sampled both Pat's and Geno's cheese steaks. Alas, there were too many years between eating each to compare which is best, but I do recall they were both excellent.