Greetings and Partings
For formal occasions, Thai people greet one another by placing hands together in front of the body and making a little bow. Friends greeting informally will just say "hello." People will issue invitations for parties or meetings, but other times it is appropriate to make a visit without an invitation or to just call ahead. It is not polite to make a visit during meal times unless invited. Afternoons are usually a good time for casual visits. Also, do not stay late at night. Many people may be headed to bed by 9:00 p.m. or so.
It is customary to bring a gift of food to one's hosts. Fruits, snacks, or regional specialty foods are appropriate gifts. Always take off shoes and socks before entering a house. Hosts will usually offer something to drink and maybe some type of snack food.