I'm a huge fan of bar carts. They always look pretty and elegant. Here are a couple of my favorites.
If you don't happen to have a really pretty bar cart, don't worry, a bar on a table or dresser can look great. Take a simple tray, some drinks glasses and some pretty bottles and voila you have a beautiful bar.
Huestis Tucker Architects, LLC
If you are renovating or doing an additon, a bar cabinet is a nice thing to design into your project.