I actually just eat at the Denny's that Walt was in at the start of this season about an hour ago. Its funny that in the show that Denny's is supposed to be in some other place, because its very recognizable as being in Albuquerque.

We really dont have that much meth in Albuquerque, and not nearly that many gang members! Also I have never seen a tented house in New Mexico! They did get a few things right though, lots of people do refer to the area as "the 505". I do enjoy the show though.