One of several options, the Rex Whistler restaurant, with the artist's famous 1925 mural stretching the length of one wall, can be booked by a maximum of 80 people for £2,800 for a buffet or sit-down dinner. Other possibilities include the new Manton Entrance (600 capacity/£5,400) and Room 15 (400 capacity/£5,400), which is full of Pre-Raphaelite paintings. Call: 020 7887 8008 (www.tate.org.uk)