he had begun the evening by enjoying himself : he had enjoyed reading the good-bye cards , and receiving the hugs from several not entirely unattractive young ladies of his acquaintance ; he had enjoyed the warnings about the evils and dangers of london , and the gift of the white umbrella with the map of the london underground on it that his friends had chipped in money to buy ; he had enjoyed the first few pints of ale ; but then , with each successive pint he found that he was enjoying himself significantly less ; until now he was sitting and shivering on the sidewalk outside the pub in a small scottish town , weighing the relative merits of being sick and not being sick , and not enjoying himself at all .