Enrique and a friend, José del Carmen Bustamante, sixteen, venture into El Infiernito to buy marijuana. It is dangerous. On one occasion, José, a timid, quiet teenager, is threatened by a man who wraps a chain around his neck. The boys never linger. They take their joints partway up a hill to a billiard hall, where they sit outside smoking and listening to the music that drifts through the open doors.
What do "venture into", "linger", "joint", "partway", "drift", and "open doors" mean in this context?