Of course the old boys network only applies to those perceived as 'toffs'.
It never happened in the mining industry did it...or many other blue-collar occupations, trades, small businesses, farms ?
Most of us use 'contacts'. It's the way of the world. Sometimes it's good to have friends and relations.
Wherever would that game of marbles for grownups...GOLF be, if not for such social interactions for the sole purpose of furthering careers and business interests ?