Congenial; welcoming people as guests.
Exclusive and cliquey.
Resembling or characteristic of the dance music played at nightclubs.
Fond of frequenting nightclubs.
Friendly and peaceful.
Relating to relations.
Dealing with the whole of human relations and their social context, rather than an independent and private space.
Of a database technology using tables and the principles set forth by Dr. Edgar F. Codd. (Contrary to popular notion, "relation" in this context refers to tables, and not linkages.)