gregarious

gre-gar-i-ous/ɡɹɪˈɡɛɹiəs/US

adjective

1
Enjoying and seeking out the company of others.
A gregarious host, he knew everyone's name by the second hour.

From Latin gregarius, "belonging to a flock", from grex ("herd").

Also useful for “gregarious”:Crossword— A long fill for tough grids