Exercising Chickens!

     My whole life I have always been skinny, but to my grandma who randomly decided that her new years resolution was to join a gym I was fat as a jack. She randomly thought that I should join her resolution and exercise at the gym with her. I really would not mind, its just I'm kind of busy and it would add more to my plate. Its not like either of us really need to lose wait. We are both quite skinny, but she really wants to. I wouldn't mind, I could stop exercising with my dad every Tuesday, but I'm just not sure if I want to take on any extra activities right now. What do you think, should I join a gym?