In Lisbon, it is customary to greet each other with a handshake, and close friends may kiss on both cheeks. When visiting churches and other religious sites, it is important to dress appropriately and cover shoulders and legs. Tipping is expected in restaurants, usually about 10% of the total bill. It is considered impolite to speak loudly or show affection publicly. Also, the Portuguese value punctuality and it is advisable to arrive on time for appointments and meetings.