Hi Valerie,
What some associations have done is create additional "teams" called "Other Ice Use" or "Clinics" and then schedule practices for those teams. Just keep in mind that the pricing for the site is based on the team count, so it's better to use general team names (like "Other Ice Use") and then use labels for the practices to describe what the on-ice session is and who it's for.
Hope that helps,
Shaun