Saturday Night
It’s been a long time gone since Crosby, Stills & Nash made “Almost Cut My Hair.” Even so, they still sound harmonious and fresh. David Crosby and Graham Nash are playing London tonight: close your eyes when they sing “Marrakesh Express” and it could — almost — be Morocco in 1969.
Royal Albert Hall, Kensington Gore, SW7 2AP. Information: +44-20-7589-8212, http://www.crosbynash.com, http://www.crosbystillsnash.com, http://www.royalalberthall.com.