Exercise is total BS? In about a year I went from 83 kilos to 70 kilos purely by walking a minimum of 10,000 steps everyday. In all that time I have never changed my diet simply because it was fairly healthy anyway. It was just that as I got older my metabolism slowed down and before I knew where I was I was sporting a paunch. By walking I can allow myself to consume naughty things such as beer, in moderation when ever I please. I have never counted calories.
What I will say is, joining expensive gyms is really rather pointless, unless for some reason you want to be a meatheaded, muscle bound superhero wannabe.