Calm celebrates Towel Day. "According to "The Hitchhiker's Guide to the Galaxy", a towel is about the most massively useful thing an interstellar hitchhiker can have. Partly it has great practical value. You can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapours; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a miniraft down the slow heavy River Moth; wet it for use in hand-to-hand-combat..." So... you bring a towel and they'll give you a free beer. Mkay. Probably a good place to meet Douglas Adams fans. No entry fee.

• Nightlife