Salvador Dalí once asked room service at Le Meurice in Paris to send him up a flock of sheep. When they were brought to his room he pulled out a gun and fired blanks at them. George Bernard Shaw tried to learn the tango at Reid's Palace in Madeira, and the details of India's independence were worked out in the ballroom of the Imperial Hotel, Delhi. The world's grandest hotels have provided glamorous backgrounds for some of the most momentous - and most bizarre - events in history. Adrian Mour ...