Gym Ideas for Mothers Day gift ?? (in Queens) HELP !

Hi girls.
Id like to get my sister a gym membership for mothers day, she LOVES to work out, and with 3 kids, shes lucky if she gets to eat lunch !

She lives in Middle Village/near Forest Hills area.

Has anyone ever heard of Power Factory ? (off of Myrtle Avenue) How is it ???

Lucille Roberts on Austin St would be an option but I know parking is a nightmare there! and then Lucille Roberts on Myrtle Avenue is an option also...

any other ideas ?

Thanks!