Have you ever seen a module’s singleton class open up?

Consider what the following would do?

module Golf
	def chipping
		puts "chipping"
	end	
end

module Titleist
  class << self

  	include Golf

    def drive
      puts "driving"
    end
  end
end

• The drive method would be available on Titleist.
• …and given we have included Golf chipping should also be available on Titleist.

Titleist.drive
# => "driving"
Titleist.chipping
# => "chipping"