'The Singers Club was NEVER at the Princess Louise.'
Not true - after it left The Union Tavern it went to The Bull and Mouth in Holbourn, and from there, back to 'The Princess' for a period; then it moved on to The Cora Hotel in Kingsway.
It was a tradition that every time it moved Ewan wrote a verse of a song about the new venue (Song of the Travels) - this probably ended up with the rest of the collection at Ruskin.
Jim Carroll