Tennis Lessons for beginners over the summer

My kids are interested in learning tennis and have been bugging me to find tennis lessons or classes for them. They are 9 and 12 and have never played before. A lot of the info I've found online seems to be for classes during the school year, or summer camps over the summer. I don't want to commit to a whole week of camp, but would like to use the summer to get in some weekly lessons/classes to get them going before next school year. Any recommendations for evening or Saturday classes over the summer, that would be good for beginners?

Thanks.