RE: How many share runways with full scale?
Cleveland and Seguine TX are two locals close to Houston that are flown at, this is of course with permission, on non-busy days or week-ends, and with continuous radio contact with the FBO manager. People also get permission from small fbo's that are home to only a few hangared ga aircraft, are private, and usually a grass field. Some of, if not most, invite the clubs and like the activity.