According to their website:

“Upstairs at the Gatehouse is an award winning London  Theatre with a varied programme of drama, musicals and fringe theatre productions. Situated at the top of Highgate Hill we really are London’s Top Theatre.” 

The next production will be Guys and Dolls.

Here’s a synopsis of the synopsis of the story

“New York, the city that never sleeps. And within it, all human life. From the news seller to the chorus girl, from the gambler to the missionary – all of them caught up in the teeming vitality of the city streets.

Sergeant Sarah Brown, of the Save a Soul Mission, vainly trying to spread the Word, and make a difference to the sin and depravity of the streets, full of tipsters, gamblers and con men. Adelaide, the showgirl, desperate to leave behind her seemingly glamorous lifestyle for a white picket fence and roses round the door. Nathan Detroit, trying to find yet another new location for his floating dice game, keeping just one short step ahead of the law. And the gamblers themselves, eager for just one more roll, for that winning streak which will keep them ahead of the game. And the coolest, highest roller of them all, Sky Masterson, who would bet on anything that would turn him a profit. These are some of the characters of Damon Runyon’s story.”

Upstairs at the Gatehouse.,