An internet table
Intelligent Vibrations provides an "internet table" specially designed for bars and Internet Cafés :
The whole surface of the table is an interactive TapScreen: clients Interact by tapping with their fingernail, pen, fork or spoon... Customers can place orders for food or drink directly from their seats, choose items to view on the computer, or...go on-line. Water, grease, food and scratches do not disturb the functioning of the TapScreen. It works even when objects are placed on it. Interactive zones on the table can display menus, advertise local businesses or present other information
Picture found on craowiki: What's interesting here is the technology they use which is based on the detection of Bulk Acoustic Waves. It's then a kind of communicating glass.