A few years back, I think a team of pub quiz champions all enrolled at the Open University, with the express intention of winning university challenge. I don't know how they did.
There's now the University Challenge, The Professionals. So it's never too late.
When I was at uni, there was an intercollegiate trivia quiz between the colleges of the University of London. It was sponsored by K cider and Time Out, and the prize for winning the UCL heat was a crate of K. The union decided to give us the prize the afternoon of the grand final at ULU. So having nothing better to do, we decided to sit in the union and drink the cider, it was 6 bottles each. Effectively the team destroyed itself, we were unable to walk, focus or talk. We still came 3rd though.