The sales staff leaves you pretty much alone so you can browse without a shadow, then don't be afraid to walk away until you find what you like, not what they want off the lot.
Yep, we had to do that at one dealership, they were trying smoke and mirrors and we ended up walking and buying the same car cheaper at another. It's a total scam, walking back to the "general manager" to see if they can meet your price. Him walking out offering a middle point, they get trained on this process. To save time, just get an idea what you will pay under their best price and stick with it.