leenia wrote
"a woman and her adult son were doing songs and ballads from America and Scotland. They were great ones for thumping the floor with their feet."

Hmm! I'll take a guess that this was Sara Grey & Kieron Means. If it was - and all you got from their performances was the sound of feet tapping - then I am very sad for you. Sara & Kieron are amongst the most outstanding, exquisite of performers on either side of the Atlantic. Yes, they tap their feet to some, not all of their songs and tunes, but in the very many times that I have heard them, I have never found this to distract from my enjoyment.

Of course, it could be a different mother and son.....

If counting the foot taps is your thing, could I suggest a concert by La Bottine Souriante or any other of the leading Quebecois groups.... you would have many more than the 2304 you counted this time to complain about.