Today's photo shows Lawrence Welk and some of his fans at Nixon's Restaurant in July of 1957. Richard M. Nixon's brother, F. Donald Nixon, opened his first restaurant in Whittier, followed in 1956 by a second restaurant at 1501 W. Commonwealth Blvd in Fullerton. Eventually, he also opened a restaurant and nightclub at Harbor and Katella (adjacent to Disneyland) in Anaheim.
In Jan. 1957 Howard Hughes loaned Donald Nixon $205,000 to keep the chain of burger joints out of bankruptcy. But it only postponed the inevitable, and soon the business was sold off to pay creditors. Unfortunately, I don't know which of the restaurants is pictured above, but it was taken when the chain was scrambling to get back on its feet.
According to the Arcadia postcard book about Fullerton (Morris/Richey/Thomas), "Donald Nixon's questionable business practices remained a lifelong embarassment to his brother,... and the president had his younger brother's telephone wiretapped in order to monitor his financial activities."