2. Jeremy Piven - Worst Tipper - Piven visited a sushi spot in Aspen named Nobu, with twelve guests, unannounced. After the meal, it is reported that Piven said to the manager, "Thanks for nothing" and left a signed ENTOURAGE DVD for a tip. Apparently, the server was so mad he hurled the DVD at Piven as he walked out. What a pile.