Some historians claim that the tipping tradition began in England in the 18th century. To receive coins from impatient patrons, an innkeeper placed a small urn, with the engraved words ‘To Insure Prompt Service’, on top of his bar counter.
According to etiquette a host(ess) gift is not necessary, as long as, you reciprocate the invitation within the next three months. In lieu of returning the invitation you also have the option of offering a gift to compensate for your social obligation. It all depends on your entourage or family’s customs.