I am looking into practicing judo to enhance my bjj. It is fortunate that there are about 5 judo gyms with in 3-5miles of my house. What are somethings to look for in a good judo gym? What kind of comparative analysis should I be looking at? A couple of them have sent persons to the olympic trials. Note my judo is limited to what I've done over the years in bjj, had some exposure as a kid in pe and some for about 6months. I can do various tumbling and take a fall.