in rio, there are some specific rules on how to properly entering and exiting a restaurant when accompained by someone - for couples, it is common practice fo the man to enter the establishment before the woman, while the opposite holds true when exiting.

in some high end restaurants, hosts or hostesses will address the male to ask about the number of required seats or any other specific request - when sitting at the table the host will often seat the female first, or the male might pull a chair for the female before himself.

when exiting, the woman lead the man, and should she stop to greet someone sitting at another table, it is customary for the male not to stop and wait outside.