I love going to the gym and I'd would be happy with the gym membership. I think the reaction would really boil down to the guy's personality. If he is kind and caring, I think it should be taken as a loving gift. On the other hand, if he is putting the woman down or making sarcastic comments that offend her, maybe accidentally punch him :-) On a health note, start going to the gym, start exercising no matter what age. It makes a huge difference, so think positive, and be thankful for the membership in any case.