This is someplace in the LA area yes?
I am assuming you don’t want to look at health clubs near you as you simply want the class, and not to pay a monthly membership.
Regarding zumba, if you go to zumba.com you can plug in your zip and find local classes.
Regarding yoga there are a few good ways to go about finding classes. You can go to the yogaalliance.org and search their directory for teachers on the alliance by location. The alliance is the largest professional organization of teachers around, and it is non affiliated with any one school, so you will find a range of teachers, and they also have designations that will let you know how much teaching experience an how much training they have, and the style of yoga they teach.