Gloves should be worn on the streets of cities and large town, when going to church, to a luncheon, dinner or reception; a dance, a wedding or an official function. They are also worn to a restaurant and in the theater. Smart women usually wear gloves while travelling on a train or plane … or in any public conveyance. On formal occasions, gloves are worn by the guests and by the hostess, while she is receiving.
Wedding Hat Etiquette For Guests (BridesMagazine.co.uk)