You are purchasing a 30 day membership for $49.  Come to as many classes as you like during your 30 day introductory membership period.   After the 30 days, your membership will convert to a regular unlimited membership and you will be billed $29.75/week.  There are no fees or contracts and you can cancel at any time.   You can also choose a limited one visit per week membership for $14.75/week.