John Mayer is one prankster. The singer hit a Hollywood favorite Italian eatery Dan Tana’s last night. When an autograph hunter approached John and asked for his autograph, John refused to sign his own name and signed Eric Roberts instead. Eric Roberts? Isn’t that Julia Roberts’ brother?
Anyhow, back to Dan Tana's. This is restaurant is the ultimate Hollywood hangout. With the best Italian dishes, super sized drinks and not to mention cool bar which will have...