S.B.
JC,
I'm pretty sure there are prenatal classes offered through Northside Hospital at their Alpharetta campus off of Old Milton Parkway. Here is a link that talks about a class called "Healthy Beginnings" for expectant and new moms including yoga and water and regular low-impact aerobics: http://www.northside.com/classes_events/Maternity_Parenti.... Using a hospital program will allow you to avoid having to have a gym membership. good luck!