Usually I don't. I especially don't mind when a younger person has questions or needs advice. All too often you see people at Gyms lifting incorrectly or just look lost. When I first started lifting, I had older guys at my gym helping me out and giving me advice and it was much appreciated. I have no problem returning the favor. However, if someone just wants to come up and talk to me about nonsense, then I have no patience for that. All too often people use the Gym as social hour instead of its intended purpose, and no headphones or iPod can keep them away.