Convivial (adjective)

1. Friendly and sociable; conducive to or characterized by joviality and good cheer.
2. Fond of social pleasures, especially eating and drinking with friends.
3. Marked by a spirit of good fellowship and geniality.

Origin:

From the latin convivium meaning "banquet" or "feast".

Examples:

1. The party was convivial, with everyone enjoying themselves.
2. The convivial atmosphere made it easy to strike up a conversation.
3. The host was convivial and made sure everyone was comfortable.
4. The restaurant had a convivial atmosphere and the staff was friendly.
5. The convivial gathering of friends was the highlight of the weekend.