In a friendly and pleasant way, especially when talking to other people.
Sociably makes people think of being nice and happy when talking to others.
Examples:
She always talks sociably to everyone.
He smiled sociably at the party.
They played sociably with the other kids.
The dog barked sociably at the mailman.
The cat meowed sociably at the birds outside.
The old man always waved sociably to his neighbors.