The word 'fuck' is only allowed to be used once in every series. It's always said in the last episode.
There are three different versions of how Jonny and Janet got together. In the first series, Gaz states that Jonny left his previous girlfriend for Janet. In series 2, it's Janet who left her boyfriend, Andy, for Jonny. In the musical special, they are both single and meet in a nightclub.
In the first series, the "Girl's Pub" is the Mayhew Inn, while the "Boy's Pub" is the Archer Hotel (in subsequent series only the Archer is used), a reference to script editor Paul Mayhew-Archer. Similarly the final end credit icon for the series title shows Nickson's ready salted crisps, a nod to the shows' creator Susan Nickson.
The shows' creator Susan Nickson had worked in media since she was 14 and was still attending High School when she created Two Pints. Aspects of Louise's university life matched Nickson's.
The title is a reference to the 1980 hit single "Two Pints of Lager and a Packet of Crisps Please" by Splodgenessabounds.