If she can stay until the weekend (July 7,8,&9) there's Newcastleton Festival. It's a small village right on the border about 30 miles NE of Carlisle. There's no paid guests apart from the ceilidh (dance type) bands. There are various competitions and plenty of singarounds and sessions in "The Grapes", "The Liddiesdale", & "The Legion". Everyone just goes for the joy of singing, playing, oh yes I almost forgot drinking. LOL.