The two-course evening out is made possible by the Wigmore Hall’s late Friday-night concerts, so if you get out of a central-London show - or dinner - by, say, 9.30, you can add a second layer of entertainment at 10. In my case, a ferociously poor hour spent at contemporary dance in Sadler’s Wells was offset by an hour with Joanna MacGregor in a stimulating splicing of Bach and Shostakovich piano music that at least offered something to think about, if not ultimate satisfaction. Evening not entirely wasted, then.