Zipp's is a microcosm of what's wrong with Phoenix, and especially Scottsdale. I've been here about a dozen times, so I'm not a regular, but it's more than one experience. The service here sucks giant rhino balls, to put it bluntly. Which seems odd considering the number of wait staff they typically have.
I went in here with a group of about two-dozen people on a Tuesday night in 2009 and they carded all of us. Fine. We all came straight from the job (guitars, think about it) so it's not like we were dressed down. One guy which with us, age 32, was from Mexico and had his national ID. And these fools wouldn't accept it! Even the manager! Ok, so we took our $300+ to the place next door (One Eyed Dog, now Clancys) and they served us all.
But that's not it. I've come here only because of proximity and waited what seemed like 5-10 minutes to get a drink on a slow weekend! It's like the waitstaff puts a priority on their texts and that's it. Fuck this place, the only reason I give it 2 stars is at least their hamburgers are decent.