He was a fixture in Galway's traditional music scene during the 1970s and 1980s, playing with artists such as Mary Coughlan, Mick Lally, and Christy Moore.

[citation needed] Finn's Cellar Bar sessions also included actor Mick Lally, who was at that time more noted for his singing than for his acting.

[4][5] Internationally renowned Galway-born blues singer Mary Coughlan was also a close personal friend of Finn.

Frankie Gavin (fiddler) [6][7] [8][9] took part in the group's sessions, as did Gerry Carthy (www.gerrycarthy.com), Pete Galligan, Charlie Harris, Johnny (Ringo) McDonagh, Sean Tyrrell, Jerry Mulvihill, and singers Dolores Keane, Mary Coughlan and Mary Staunton; from these sessions, the group De Dannan was formed.

On listening to the Johnny Mulhern song Hard Cases, Moore remarks on his Christy-Chat website how it brought him back to the Cellar Bar days in Galway.

Finn appeared in the 1985 Welsh-language TV film Pair of Shoes (Pâr o Sgidiau), comedy-drama road movie[10] starring Neil Tobín, James Bartley and David Kelly.