Back to the topic at hand, I agree with Lani. There is no need to wear a rep into an AD.
When I went to Vegas, I wore my WM9 sub and my Rocket Dial Cartier. The first day, when I was wearing the submariner, I took it off, put it in my back pocket and walked into the Rolex AD at the Wynn. The sales man there was phenomenal! He was very courteous and generous with his time. He would show me anything I asked to see and try on. He even pulled out the new stock that had just arrived so he could show me the newest white gold daytona with the grey dial. It was beautiful. I also took a good long look at the SS submariner. Checking the usual items so that when I left the store later on I could compare my sub and see what the flaws were.
The next day, I went to the Cartier dealer and had a look at the Santos 100 they had on display. This time, I wasn't even talked to by a sales rep. They just ignored me. Same was true later that day when I went to Tourneau's at Caesar's Palace. They just completely ignored me.
I guess I have two points with my ramblings:
1) I would never ever wear a rep into an AD. To me that is just way too cocky, as if you are baiting the sales rep to see if they are smart enough to find you out.
2) Not all sales reps are pushy and/or needy for that next big sale. The rolex salesman probably sells more than enough watches a day that he can take his time with each and every customer. My theory is, you never know who you are dealing with. Ever. Every person that walks into that store is a potential customer and, especially in Vegas, could come back later with a wad of cash from winning big at the craps table and drop a pile of cash on a watch (or whatever). Everyone should be treated as a potential buyer.
Just my 0.02 (or $2.00)