noun

the quality of being friendly and lively; friendliness.

the conviviality of the evening

friendliness,geniality,affability,amiability,congeniality,good humour,cordiality,warmth,warm-heartedness,good nature,sociability,gregariousness,clubbability,companionability,cheerfulness,cheeriness,good cheer,joviality,jollity,gaiety,liveliness,festivity,bonhomie