The comedy of manners is not dead. It’s alive and kicking, often literally, at this north London venue in actor Simon Paisley Day’s new play. Although the title suggests a group of teenagers dancing in a warehouse, the actual subject of the play is a handful of couples who have left their children behind in order to spend three days relaxing in a remote countryside location. Throw in one or two wild cards and this laughter machine is soon turning over.

“Love and pain is like peace and war - you want one you have to have the other.” It’s a line that pretty much sums up From Here to Eternity. The title of James Jones’s novel and the classic movie which it spawned gets rather lost in the new musical from Tim Rice, Stuart Brayson, and Bill Oakes.

The Royal Court is justly proud of being the home of British new writing, but it is also a venue which has a great tradition of staging work from abroad. From bringing Brecht and Beckett here in the 1950s to its more recent international summer schools, this is a place where you might make the acquaintance of Eastern European, Latin American or Russian playwrights. Now, following in the footsteps of Chennai-based Anupama Chandrasekhar, whose play Disconnect was here in 2010, comes another Indian talent.

Southwark Playhouse's new production of The Love Girl and the Innocent is London’s first in over 30 years, and there’s a reason Alexander Solzhenitsyn’s play rarely reaches the stage: it’s a lumpy mammoth of a script, demanding a cast upwards of 50, with stage directions that would be monumental if interpreted literally.

Henry James said, “Realism is what in some shape or form we might encounter, whereas Romanticism is something we will never encounter.” The 19th-century Realists believed that “ordinary people” were “fit to be endowed” with the greatness of imaginative writing. Rachel Trezise’s first stage play, Tonypandemonium, an attempt at kitchen sink par excellence, understands James’ definition; unfortunately it does not seem to understand the second part; that realism is different from mere replication, and that it must belong to artistry.

Is this the year’s most controversial play? When it opened at Edinburgh in August, David Greig’s The Events created a stir because its depiction of the aftermath of an atrocity is reminiscent of Norway’s Anders Breivik and the 2011 Utoya shootings. The more lurid commentators denounced this as exploitation theatre; concerned liberals shook their heads. But, with the play now visiting London, audiences have the chance of appreciating a much deeper work than the fuss suggested.

It's often a sign of a good drama when, as it concludes, you find it hard to tell which character you dislike most. And so it is with Adult Supervision - all the way through, first-time playwright Sarah Rutherford skilfully manipulates your allegiances, causing your sympathies to shift and shift again until there is no one left to be redeemed.

Once upon a time, there were two cultures, and they were at odds. A forested wilderness stretches between the kingdoms of Sealand and Lagobel, as we glean from the childishly-drawn, giant map that serves as a front cloth for the NT's new musical spectacular – directed by Marianne Elliot and opening in the Lyttelton last night. The map shows, on one side of the wilderness, Sealand’s coastal realm with winding rivers and a chateau bristling with turrets, all in shades of blue.

The setting is Dublin. We're talking modern-day and down-at-heel in this major new musical which has a deliberately scruffy look – with a launderette glowing in the dark and a concrete, four-storey housing block hulking upstage. The adaptation is by Roddy Doyle himself, based on his 1987 comic novel.

British theatre is obsessed with the new, with novelty. And one of the obvious casualties of this is old plays that are not by Ibsen or Chekhov. Plays that feature in every history of British theatre, such as Arnold Wesker’s 1959 classic, Roots, about the political and sentimental education of Beatie Bryant, with its uplifting final scene of her self-awakening. At last, this revival gives us all the chance to watch a legendary piece of our cultural history.