Beer is beer. Thailand has 100 beers now. Women 50% less fat. Northern curries are world class. Pork, chicken great. 7/11s great. Hotels $25. Kayaking $30. Great mountain walks. Beaches. $25 bungalow on beach. 10 baht boat trips. Waterfalls.
Apart from "shows" and museums i cant see how London wins.
You might see 3 shows a year if that. 1 museum. Rest of year wish you werent there.