My 3yo daughter started taking ballet at the San Antonio School for the Performing Arts at the beginning of February. She loves it, and I am so impressed with her teacher. My daughter struggles with social interaction, and her teacher is the most patient person. She kept encouraging C without overwhelming her the entire two months it took her to walk into the class by herself from the doorway. The other little girls who have been there longer seem to love the teacher as well. It's a 3-4yo beginning ballet class, and they do a bit of tap at the end of every session. It's about 45 minutes of ballet and 15 minutes of tap every Saturday. The same class is also offered on Tuesday afternoons, I think.
The school also offers jazz once the children get a little older as well as piano, guitar and other private lessons for musical instruments. It's on Jones-Maltsberger, kind of close to but a little north of the NEISD Blossom Athletic Complex.