The way your question is worded, it sounds like you want to know if there are any churches leasing space in public schools for christian services. I think that goes against the laws of the US and most likely is not happening.
You would have to check with each school district. They have no reason to publish that kind of stuff on the web. There are several Protestant churches in the Phoenix area that rent space on Sundays. The school district I work for rent space in two of our elementary schools to local churches.