I have a counter that is usually cluttered with stuff, but it has 2 levels, higher on either end, and the mid section (not cluttered) is low enough for them to sit across from me on the bar stools that we have on both sides of the counter. Customers are not welcome on the other side of the counter unless they bring beer....lol I used to have just my desk that customers could sit across from me, but too many felt welcome to watch me on the computer (which I HATE), so I fixed that problem.... and I also rarely ever do ANY type of layout work with the customer there waiting.... I always submit a proof via e-mail or have them come back.