Viking Fitness Center, Port Huron

With 10 total locations—each packed with cardio and strength-training equipment as well as a wealth of classes—Metro Family Fitness makes it easy to get in shape. Several locations are women-only, granting members a comfortable environment to work out in as they boost muscle tone, burn calories. Classes such as boot camps, yoga, and zumba help increase their heart rate in far safer methods than watching horror movies for 48 hours straight.