My dad introduced me to the delights of professional football by starting to take me to Eastville Stadium in Bristol Rovers' halcyon days in the early 1950's.
The general opinion amongst Rovers followers and the Bristol sports writers at the time was that 'Irene Goodnight', a popular song from the late 1940's, was sung initially at a 'derby' match at Eastville by visiting Argyle fans, and the song was was subsequently adopted by Rovers supporters as the Club enjoyed previously unparalleled success, winning the Division 3 (South) championship fir the first-ever time in 1953, and several exciting FA Cup campaigns, including an away draw against Newcastle United (Jackie Milburn & Co) in sixth round in 1951 and a 4-0 win over Manchester United's ' Busby Babes' in 1956.
The song is, of course, still a favourite with Rovers supporters, but I think it's popularity with Argyle fans faded quite quickly.
PS: I'm not Gas, I'm a Pirate!