If you are looking for a casual bike ride in South Tampa, here are my recommendations. Bayshore linear park is a great park for a casual bike ride as there should be no cars to fear. Davis Islands bike trail is another good one, but do not limit your trip to the trail. Go ahead and check out the rest of the island and then stop by the downtown area for something to eat or a cold drink. Downtown Tampa, Davis Islands, Hyde Park, and Ybor City are all within a short bike ride of each other. Try parking in one area and then riding your bike to another. If you don't have your own bike to ride there are a couple of places to rent them; Coast Bike Share and City Bike Tampa.