The musical that defined an era is back on the West End, allowing a new generation to see what all the fuss was about 33 years ago when a non-narrative extravaganza as heavy on dance and scenic effects as it was light on plot launched itself in London and, soon after, the world. The terpsichorean ambition of Cats is holding up pretty well now, it must be said, thanks in large part to a new breed of triple-threat performer whose movement skills were harder to come by three decades ago.

With a bloodthirsty, corpse-devouring plant called Audrey at the centre of events, we can only be in the Little Shop of Horrors. It’s a far cry from Jack and the Beanstalk, but the Royal Exchange is known for providing alternative and, usually, zany seasonal entertainment. And they don’t come any zanier than this, especially under Derek Bond’s zippy direction.

Santa Claus does make it to the Menier Chocolate Factory this Christmas but his name is Sam Byck and he plans to fly a 747 into the White House and “incinerate Dick Nixon”. So not the Christmas show, not in any traditional sense, actually not in any sense, but a hymn to the disenchanted and disenfranchised of America and in particular the infamous few for whom the Dream finally died when they exercised their right to bear arms and “moved their little finger” around the trigger. Hail to the Chief. Bang.

The bittersweet career of The Kinks is portrayed to surprisingly potent effect in this fast, funny and sometimes poignant musical, now transferring to the West End from the Hampstead Theatre. No mere "jukebox musical" – though it's crammed with songs – it finds space for some kitchen-sink drama, a bit of psychotherapy and a few smart insights into the Sixties pop business.

It's throwback week on the West End, with two very different shows recalling the darkest days of America's racial disharmony. But whereas The Scottsboro Boys shocks and satirises and has us choke on our own laughter, Memphis is content to be the feel-good flipside. Throw a few home truths and some grit into the mix – disturbing but not too real – keep it predictable and sentimental, even a little patronising, and you ensure that everybody is dancing in the aisles and feeling good about themselves at the close.

You come away from The Scottsboro Boys sure of two things: that the next cakewalk you hear will induce queasiness and that the show's director/choreographer Susan Stroman is some kind of genius. This kick-ass West End premiere, now happily transferred from the Young Vic, has a simplicity, a precision, a visceral energy, a choreographic razzle-dazzle that make an art of catching you off-guard. The story of the Scottsboro nine shamefully symbolises the sickness that once resided (and maybe still does) deep in the heart of American society.

There’s a moment of stunned silence in Imelda Staunton’s storming Mama Rose at the Chichester Festival Theatre, a long, long, moment where neither speaking nor singing she conclusively demonstrates what a difference a great actress makes in this most iconic of musical theatre roles.

The National Theatre's new Dorfman auditorium gets off to a kick-ass start with Here Lies Love, the Off Broadway musical transplant that does for the closing months of Nicholas Hytner's tenure as artistic director what Jerry Springer the Opera did for the early days of his regime a decade or more ago.

It's tempting with this show less to write a review per se than to simply pile on the puns, but that would be to piss on - sorry, I meant do a disservice to - both the musical that is Urinetown and to the exceptionally deft UK premiere that the Broadway sleeper hit from a dozen or more years ago is currently receiving at the hands of the director Jamie Lloyd. In New York, Tony-winners Mark Hollmann and Greg Kotis's wilfully self-conscious pastiche was by turns winning and wearing, in accordance with a piece that has barely begun before it starts to self-deconstruct.

“It takes a star to parody one,” wrote theartsdesk’s Edward Seckerson, nailing the essence of this immortal spoof-fest’s last incarnation at the Menier Chocolate Factory. Star quality was assured given the presence of Damian Humbley, peerless in Merrily We Roll Along and even the unjustly short-lived Lend Me a Tenor, who’s in this transfer.