Some like it hot, and here they are in heaven. Be forewarned: timid palates should steer clear of the super-spicy Sichuan dishes that have made Z & Y a Chinatown smash hit. Nearly every dish is crowned with chilies, from the huge mound of dried peppers that rests atop tender, garlicky bites of fried chicken to the flaming chili oil anointing tender, flaky fish fillets in a star anise-tinged broth with Sichuan peppercorns aplenty. The well-worn dining room may seem unremarkable and the service perfunctory, but the crowds are undeterred. Plan to wait among eager fans for a seat; then settle in for delicate pork-and-ginger wontons swimming in spicy peanut sauce and more chili oil. Allot time to navigate the challenging parking situation.