‘Brain gyms’ which help members to ‘work out’ their brains are springing up all over the country. They’re essentially computer labs stocked with software that run users through mental-fitness tests and exercises.
One such example is a gym in San Francisco which charges $60/month. It’s interesting that people would find it more beneficial to go to such a place and pay a great deal more when they could get a similar (or possibly the exact same) service online or at home.
A simple search for ‘brain exercises’ yields millions of results, but within the first 10 results are different websites and references for online services, some of which are free.