Congeniality (noun)

1. The quality of being congenial; friendliness and warmth.
2. Pleasantness and pleasant qualities, especially with regard to social behavior.

Origin:

Early 17th century: from late latin congenialitas, from latin con- "together with" + genus "race, kind".

Examples:

1. The congeniality of the staff made the office a welcoming and enjoyable place to work.
2. Her congeniality and willingness to help others made her well-liked by everyone.
3. The congeniality of the gathering was apparent in the laughter and good-natured conversation.
4. Her congeniality and easy-going nature made her a natural fit for the role of host.
5. The congeniality of the couple made them popular guests at social events.