Wiktionary
n. Someone who lives well.
Wikipedia
Usage examples of "viveur".
They sought the short paragraphs in which were related, in detail, the doings of the demi-monde, the last supper given by some well-known viveur, the details of some large party in such and such a fashionable club, the result of a shooting match, or of a fencing match between celebrated fencers!
Dupont reflected--he had not seen Louis for several years--but the boy carried something uncommon in his head-piece, or he, Cesar Dupont, fashionable merchant and bon viveur, had studied the craniums of a thousand San Francisco geniuses in vain.
The friend of popes and kings and noblemen, and of all the male and female ruffians and vagabonds of Europe, abbe, soldier, charlatan, gamester, financier, diplomatist, viveur, philosopher, virtuoso, "chemist, fiddler, and buffoon," each of these, and all of these was Giacomo Casanova, Chevalier de Seingalt, Knight of the Golden Spur.
His smile, between the bloated cheeks of a bon viveur, was satis.