Restaurants and bars may add a 10 percent service charge to your bill; you are still expected to tip if there is no written surcharge. When getting a massage, a haircut, or help with your luggage, it's always appreciated to give HK$20 to HK$50. Sundays are a day of rest for many, and locals flock to parks and main streets to picnic, play cards, and enjoy their day off. The streets, trains, and hiking trails are extremely crowded on these days. Despite the many modes of public transportation, Hong Kong is still a “walking” city, so wear comfortable shoes as many roads are uneven and hilly. Remember to look both ways when crossing streets, as cars, buses, bikes, and taxis rush past pedestrians. Learn to adapt to the quickened pace of the city or you may lose yourself in the crowd and therefore lose your way!