Even if you're anti-gyms, now's the time to find a gym that may appeal to you. Even if you don't want to sign your life away to a gym membership, many gyms are hurting for business during the Summer months and will eagerly hand out free trial memberships or offer other incentives to get your business.
And gyms in cities that experience hot Summers are usually well equipped with the best fans, air-conditioners, and all the cold water you could ever need. I like to laugh at myself when I'm running on the treadmill in a freezing cold gym with a fan blowing on me, as I stare outside at 112 degree weather. I love options!