The Three Englishmen: Optimists

In keeping with its title, Optimists is fun and cheerful, with some crackingly original ideas behind the pacy mix of wordplay, gentle pop culture ribbing, off-the-wall surrealism and well-executed musical comedy. The four (yup, four) play to their respective physical quirks (tall, small, pretty and vexed) for maximum laughs and no joke outstays its welcome in this straightforward but inspired hour of sketches.

The Caves, 556 5375, until 28 Aug, 4pm, £8–£9 (£7–£8).