I disagree. There are few things more fun then being at the gym. I've never gotten an adrenaline rush riding a motorcycle or dirt bike like I have at the gym lifting.
I mean banging out that last set, your veins are bulged out, your muscles are begging to stop. Your buddy is getting you fired up, your brain is totally focused on getting that last set done. The bar is cold in your hands, sweat is pouring down your face, every last ounce of you is screaming to give up, but you ain't gonna let yourself down. Not now. You've come to far to quit. It would be so easy to rack the bar and call it a day. However that sick feeling will rise from your gut if you quit. That sick feeling that makes you want to vomit because you lied to yourself. You didn't give it your all. You just quit and gave up. So you knock out your five reps, and your lifting buddy screams "TO HELL WITH THE PAIN ONE MORE!!!" Now your adrenaline is fully pumping. The testosterone is pumping, its making your brain go into overdrive. The Lactic acid has built up and you are hurting but can't feel it anymore, because the adrenaline has blocked it out. Without missing a beat you throw the weight up and nail that last rep with a ROAR!!! Your mind goes hazy as you rack the bar. You have done it. You beat it. You won. You bang fist with your buddy and look at yourself in the mirror. Knowing you have just gave it your all, and then some.
That's the kind of rush you get lifting at the gym. If you ain't puking you ain't lifting hard enough.