I've been thinking about this, and remembered seeing and hearing Africans in Senegal singing together and stamping in rhythm while pulling up their pirogues on to the beach in Kafontine, Casamance. Also, there are many 'walking the tweed' songs from the Isle of Harris where women thump the woven cloth around a table to soften it. I absolutely love working songs like these, because they sprang from practical situations and are often centuries old. They speak to me somehow!