Will they ever retire? Not likely.
According to Forbes magazine, the Rolling Stones were the top-selling musical act in the US last year. The Stones generated US$168 million in record and concert ticket sales in 2005, narrowly beating U2. The Stones' revenue was mainly generated by touring, as opposed to album sales.
The Stones are set to perform a free concert at Copacabana beach in Rio de Janeiro this weekend. (I'm sure music and passion will be in fashion.) Almost two million people are expected to attend.
Not bad for a bunch of dudes in their 60s.