Bailey is spot on.
The forum origins go back to Legends World of Sport (LWOS) when GavBT started a thread asking for some snazzy name for the 'social bar' section.
Gav being of Welsh extraction and living in Yorkshire, shared my notion that the 'Firkin' chain of British pubs was a good start.
These pubs go by various names with the name 'Firkin' always prominent as if to replace the word 'f**ken'. Thats the joke anyway.
I used to frequent the Firkin chain of pubs in GB during one of my visits there in the 90s. Their latin slogan 'biberandum ad mortum' (I think) adorned their coasters - it translated to: 'drink until you die'.
Anyway, Gav related to this totally and then named the section: 'The Firkin Fun Bar'.
The TFR version is the second in the forums chain.