inclined to associate with or be in the company of others.

friendly or agreeable in company; companionable.

characterized by agreeable companionship

a sociable evening at the home of friends.

Chiefly Northern and Midland U.S. an informal social gathering, esp. of members of a church.

noun

affability , agreeability , agreeableness , amenity , amiableness , congeniality , congenialness , cordiality , cordialness , friendliness , geniality , genialness , pleasantness , sociability , warmth