There's plenty to entertain those of us in search of cultural enlightenment this week. London's arts scene is offering a really varied pick'n'mix bag of sticky sweet treats... Enjoy! Happy Birthday West Side Story! This groundbreaking dance musical opens tonight at Sadlers' Wells, 50 finger-clicking years since it first appeared. Without Jerome Robbins' legendary choreography, Londonist can't help think everything from MJ's Thriller to Britney's school uniform would've been rather different. Tomorrow night, you......