This only really should be used in parties or social events where there is a host, like a dinner party at someone's house. Or a work office lunch, or meet-and-g

This only really should be used in parties or social events where there is a host, like a dinner party at someone's house. Or a work office lunch, or meet-and-greet. You wouldn't use it out and about on the street or the bus, unless you were really personable.