The pilot, which guest-starred Tom Poston, was produced and broadcast separately from the rest of the series. It's unavailable on DVD and streaming services.
Frank Sinatra didn't like that his likeness was portrayed and threatened to sue.
Two-thirds of the way into the first season, a newsstand was erected outside of the bar. The proprietors were crotchety Marty and his flighty brother Sid. These characters were modeled after series creators/producers Sid Krofft and Marty Krofft, namesakes of The Krofft Puppets.