Believe it or not, this is what I see all the time. I'll be walking down the street and there is someone who is woefully out of shape trying to convince me as the consumer that I should invest in the gym when he obviously didn't.
Maybe I'm crazy, but perhaps more people would take flyers from someone who looked like they belonged to the gym?
You really have to wonder what the owners of this gym think is being accomplished. Interestingly enough, the same thing happens with a ton of products. I have seen shows that are clearly not for children with images that look like they should be for kids, shows that are for kids with images that are down right scary, and the list goes on and on.
Match your marketing message. Make sure your marketing reflects your show and will appeal to the folks you're targeting.
Otherwise you're just another out of shape person trying to sell a gym membership on a sidewalk...