Just to jump into the mix, GBS is correct, there are 3 seasons of baseball in Illinois, all of which can be instructed by the coach (practice or game).
Open gyms refer to the myriad of activities that are provided for participation. Open gyms in which coaches watch players throw or hit but do not coach are illegal because the gym is tailored for the improvement of one specific sport. Senior or Captain led practices or excuse me open gyms are illegal. There can be no structure to an open gym whether it be at a off-site facility or within the schools gymnasium. Coaches/seniors/captains who are organizing an open gym with specific drills are illegal.
What can we do?
Coaches can work with 2 players individually at any one time for no specific period of time on sport specific skills.
Coaches can provide conditioning opportunities to all athletes which in turn develop their athleticism.
Develop a program that is comitted to developing athleticism, athletic ability, etc. Gets more athletes involved and more coaches from across sports communicating.