sociable
boon
companionable
festal
festive
free and easy
gala
gay
gladsome
good
hail-fellow-well-met
hearty
hilarious
jocund
jolly
jovial
joyful
joyous
lively
merry
merrymaking
on the loose
social
vivacious
agreeable
boisterous
chatty
cheery
communicative
congenial
enjoyable
frolicsome
good-humoured
hospitable
informal
light-hearted
mirthful
neighborly
trivial
apathetic
ascetic