Fantastic Negrito, aka Xavier Dphrepaulezz, is a singer from Oakland, California. His music is steeped in the raw and urgent spirituality of the early blues, especially Robert Johnson. Yet he refuses to be pigeonholed as a blues performer, disdaining all talk of genre, and infusing his compositions with the grit and anger of punk, hip-hop and hard rock as well as the mournfulness of the blues, not to mention political protest that’s bang up-to-date.

The duo of Swae Lee and Slim Jxmmi – aka 21- and 23-year-old Tupelo Mississippi brothers Khalif and Aaquil Brown – are the epitome of everything that is baffling to ageing hip hop fans. Whisked from obscurity as teenagers by superstar producer Mike Will Made It, they became the breakthrough rap success of 2014, with what appeared to be little more than leaping around shirtless barking a bunch of half-nonsensical slogans and in-jokes about how much weed, money and sex they are surrounded by.

Detroit techno music is important. Any student of the club music of the modern age knows this. The sound that fermented among the majority black population of the decaying industrial city in the late 1970s and early 1980s, as disco's last remnants fused with the avant-garde experiments of Europeans who were first getting their hands on synthesisers and drum machines, went on to change the world. It seeded the UK's rave explosion, jungle, drum'n'bass and all the electronic experiments that came after.

Lorraine Hansberry’s career as a playwright proved tragically short. A Raisin in the Sun is by some distance her best-known work, a key piece about the African American post-war experience. But she thought Les Blancs (The Whites) was potentially her most important play, although it remained unfinished at her death in 1965, aged only 34; it was assembled from drafts by her ex-husband and executor Robert Nemiroff, finally reaching Broadway in 1970.   

Shorter feels longer in the West End iteration of Motown the Musical, a minor-league jukebox venture that became a Broadway hit courtesy of an unbeatable back catalogue – keep those hits coming! – and a well-drilled production that at least delivered what it promised on the tin. Despite trims for London, the production feels more attenuated and looks markedly less polished, even if there remains little doubt that people who go expecting to rock out to the world-class sequence of hits won't hesitate to do precisely that.  

One, two, three o’clock, four o’clock rock… For those who orchestrated the swing from blues to rock ‘n’ roll, it’s getting late. Like the Chelsea pensioners, their numbers are beginning to dwindle and, as time keeps on slipping, slipping, slipping into the future, their testimony must be recorded for posterity, lest it be lost for ever in the music mists (currently somewhere off the coast of Kintyre). Except – and it’s a fairly big "except" – this stuff’s already fairly well documented, no?

If coming to Ganja & Hess under the impression it’s Seventies’ Blaxploitation along the lines of Blacula, beware. It does feature an immortal character as its lead. And there is the drinking of blood as well as violence. Instead of doing what he was commissioned to do, director Bill Gunn’s 1973 film is an art-house oddity.

This stage adaptation of Danny Robins' Radio 4 drama is a feel-good show packed with snappy one-liners from a gaggle of intelligently drawn characters. Its roots in radio are evident, to be sure: the action develops significantly at 30-minute intervals with as many jokes crammed in as possible. On the upside, the story of a failing record store and its feckless owner comes with a host of infectious tunes and a seductively atmospheric score.

It should work as pure musical theatre. Yet what precisely is Gershwin’s - or rather “The Gershwins’”, as this title frames it, though Ira wasn’t quite Gilbert or Brecht - Porgy and Bess? An opera? Trevor Nunn made the three-hour-plus score, much cut here, dazzle at Glyndebourne and Covent Garden. Michael Tilson Thomas’s Barbican espousal of bleeding chunks alongside Berg’s Lulu, left as a torso in the year of Porgy’s premiere, 1935, even put me in mind of the sheer generous optimism of Wagner’s Die Meistersinger. A musical?

As far as essential female experiences go, Esther Mills hasn't had many. A 35-year-old virgin living in New York City in 1905, she is destined to go down in history as an "unidentified negro seamstress", to cite the caption on the projected image of her that opens Lynn Nottage's Intimate Apparel in a very fine Off West End staging from the director Laurence Boswell that was first seen in Bath.