Everybody’s dressing up, I’m dressing down

Another music journo shows his ignorance - this time David Sinclair in a lacklustre review of popular Scottish combo The View for, of all things, The Times:
A new song, Fireworks and Flowers, was another twitchy, music hall knees-up — all mouth and no trousers.
Still, a knees-up with no trousers must have been quite a sight.