It must have been easy to get an autograph at Joe DiMaggio's restaurant. It is a nice one to own. Many baseball historians believe he was the best all-round player of his era. He has also become a pop culture icon, like Mickey mantle and Babe Ruth.
In retirement, as baseball memorabilia became became a popular collectible, and as a result of that more valuable, DiMaggio rarely signed for anyone who didn't pay, including his old teammates.
A signature is worth $150. On the menu it might be worth two to three times that.