The Hawkins swimming pool is a pretty good alternative to the gym. The lanes are well separated for people that choose to swim laps, but there is also a more open space for parents that bring their toddlers in to teach them how to swim, or just to float around. It is 2 dollars a person, no military discount. The only thing you should keep in mind is their hours, they usually close in the middle of the day, then reopen. The hours are different almost every day.