The cost of a Lifetime Fitness Membership depends on the location and facilities of the fitness club. Average prices hover around about $60 per person on a monthly basis. There are various types of memberships available for the clients that include Diamond, Onyx, Platinum, Gold and Bronze schemes. The Diamond membership represents the highest level of membership including additional benefits and privileges. The Bronze membership is the basic type of Lifetime Fitness Membership. Membership schemes also allow flexible hours at times.