It is imperative to know the proper etiquette with communication, physical interactions and what is worn to occasions. By studying the etiquette before traveling, unwanted confusion and awkwardness will not occur.
Social norms are embedded in our cultural with how we all were raised and by the people we associate with. For most Americans, we all like our space and only hug and kiss people that are important to us. For many Spanish speaking countries, hugs and kisses on the cheek are always exchanged.
Apparel is also very important when going out to a restaurant. It is unacceptable to wear beach clothing in high end restaurants. One way to know what to wear to a specific place is to call ahead to find out appropriate attire.