I think you would be hard pressed to find a ratio less than 7/8:1. I just don't imagine it would be cost effective for the gym, which would make it cost prohibitive for the parents.
Even our small gym are teams might be smaller than 7 or 8 kids but that's, optionals. And the optional kids practice together. So our current 6/7/8s are grouped together by skills and what is being worked/drilled. So the ratio lands between 7-10 kids per group, depending on the day.
I just don't know of any gym, at least in my neck of the woods that has a smaller ratio.
And part of being on team, is being able to focus and work in a group.