Info from Wikipedia
Clwb Ifor Bach (meaning Little Ivor's Club) is a Cardiff nightclub, music venue, Welsh-language club and community centre. It is known to the Cardiff Welsh-speaking community as Clwb (English: Club) and is often known by others on the Cardiff music scene as The Welsh Club.
Clwb Ifor Bach is located in central Cardiff, halfway down Womanby Street, a lane running from the front of Cardiff Castle, parallel to High Street/St Mary Street). The club faces the rear of a Wetherspoons pub, 'The Gatekeeper'.
The club is contained within an unassuming three-storey building. There is a bar, stage and dance floor on each level, varying in size from level to level. The top floor is the largest. The physical fabric of the club underwent a fairly major overhaul in the 1990s.
In early 2019 Clwb Ifor Bach announced plans to take over the derelict site next door to create new 500-capacity and 300-capacity venues. Cardiff Council had acquired the next door site and would lease it to the club.