Hello Monica Remelgado,
You should be able to find a gym that will let you take zumba as you wish. Just talk to them; they should be happy to accommodate you.
Have you looked into night school classes in the area at different organizations?…schools, YMCA, senior center, etc.
You may even find a zumba instructor who will work with you in private or in a small group setting.
this web site is not for a specific gym. You will need to call the club where you consider taking the Zumba class. Some clubs will allow you to be a guest as often as you like but most will limit this to just a few visits.