Expect business entertaining to be conducted in the evening. When extending an invitation, include only those with whom you are negotiating and expect spouses to be included in an invitation either way. If you are a guest in a home, expect to be seated at the head of the table. If dining in a home without servants, offing help is greatly appreciated. Women should be aware that is considered impolite to drink hard liquor.
Gift giving is appropriate, when accepting a dinner invitation for example.
Bring flowers such as roses or carnations, but don't give calla lilies which are reserved for funerals. Fine wines and Scotch are appreciated. Costa Rican woman like good cosmetics, perfume or silk scarves. A good gift for men is aftershave. Both men and women enjoy delicacies.