Running. Only real cost is shoes. Obviously other exercise too, but running you can do straight from your front door, no travel to work into the schedule, no memberships etc
Anyone here old enough to remember when Rage would debut a new "unplugged" show?... I used to tape them, both on the VCR and cassette for my Walkman. Currently listening to STP Unplugged - I remember thinking Scott Weiland was so classy sipping that huge glass of red through the set, in hindsight it was probably like 3/4 of a bottle in that glass.
Edit - thinking about it, I had a DiscMan at that point but no way to burn cds. Hence the Walkman - with the auto reverse magic.
Finnish rap...really? That sounds interesting.