Tampa's Urban Kai is a stand-up paddle board store located on the Riverwalk at the Tampa Marriott Waterside Hotel. In addition to selling paddle boards and gear, they offer rentals, fitness classes, and adventure tours. If you're in town and want to explore the Hillsborough River while getting some amazing exercise, this is the place for you. If you're already experienced, you can rent a board and head out on your own, or you can sign up for classes. Their fitness classes are great for an intense core and upper-body workout as well as developing balance. You can even join the new trend of yoga on a paddle board.