template.rb

module Drive
  def go
    start_engine
    plan_route
    follow_route
  end
  
  def start_engine
    #code here
  end
  
  def follow_route
    #code here
  end
end

class Gym < Drive
  def plan_route
    #code to find route to gym
  end
end

class Grocery < Drive
  def plan_route
    #code to find route to grocery
  end
end


Gym.new.go #goes to gym
Grocery.new.go #goes to grocery