The side compete in the annual Welsh Varsity Match against Swansea University RFC, the biggest varsity game outside of Oxford – Cambridge in the UK.The match is the highlight of the university sporting year and is played at alternating high-profile venues including, Liberty Stadium in Swansea, Cardiff Arms Park and the Millennium Stadium.
Another side, Cardiff Internationals Athletic Club normally shortened to CIACS (pronounced "kayaks") were formed in the docks area of the city, known as Tiger Bay in 1946.
There are many other recreational non-affiliated sides playing in the city, including Cardiff Bus RFC, players being employees of the local transport authority.
Past players include current Welsh Rugby Union internationals Gethin Jenkins and Andy Powell.
Demons won the inaugural title by defeating Eastern Conference Winners Army Rugby League 30–26 in the grand final, with a winning score in the last play of the match.
Cardiff Blue Dragons RLFC is now the largest Rugby League club in Wales with age grades up to senior sides for both male and female players.
Cardiff Metropolitan University/UWIC RLFC were consistently one of the best university sides in Great Britain having won the national title twice in the early part of this century.
Llanelli were winners of the competition the year after but that didn't stop Cardiff being elected to the Rugby Football League Championship in 1951.
The club enjoyed reasonable success and attracted high-profile Rugby Union converts such as Steve Fenwick, Tommy David, Brynmor Williams and Paul Ringer.
Coached by Clive Griffiths and managed by Mike Nicholas, the team played at Morfa Stadium, Swansea, Aberavon RFC's Talbot Athletic Ground and at Cardiff Arms Park.
For the 2017 season, Cardiff ARLFC play their home games at Glamorgan Wanderers RUFC (Memorial Ground), in the Ely suburb of the city.