All I could think when I passed him was: You should have stayed home with the book, Your Body, Your Life, by Kim Lyons (trainer on The Biggest Loser) and Lara McGlashan. Their super-smart slim-down/shape-up program doesnt require a gym (but does use dumbbells for some exercises), so theres no excuse for not doing it.
The exercises build on each other realistically, so you dont try the program, hate it, and use up all your willpower in one day like Gasping Park Guy. Instead, you do the prescribed exercises (especially great for people who havent been to the gym for a while, but adaptable to gym rats, too) and follow Kims nutrition guidelines (she makes tasty recipes easy), and you firm up and trim down.
But heres the thing: She knows its not always so easy. So along with all the healthy stuff, she shows you how to work with reality and eat dessert, go out for drinks, and more without derailing your whole plan. And who doesnt need that?