I wonder why? Perhaps all the puppies get so well trained here that adult dogs no longer need training? That would be wonderful, but I doubt it. Perhaps all the adult dogs here get such interesting daily walks that they don't need any further mental stimulation? Perhaps more so than in the city, but probably still not enough? Or perhaps none of the owners are interested in any canine activities? That would be such a shame. Or do people simply think that you can't teach an old dog new tricks - as the saying goes? Or they might just not realise that there are classes available for older dogs?
Dogs are never too old to learn; even my 10-year old (my saluki in the picture on the left) and 13-year old ones still love their regular training sessions. It is exercise for their brains and it keeps them mentally fit. They also enjoy this 1-2-1 quality time, something that we often neglect within our busy lives and is even more important if you have more than one dog like me.