I heartily recommend taking up an instrument. If it's something you've long dreamt of, every day you don't is a day you'll wish you did ten years from now.
Music allows me to make friends quickly and easily, anywhere in the world, with all kinds of people. Up-front costs can seem high but if you care for your instrument and choose one that doesn't require restringing, you will find the dollar cost per hour of entertainment just gets lower and lower.
That said, I do recommend getting a teacher for semi-regular lessons
I hope this helps someone!