who told you that you have to risk assess it?
I would say you always are risk assessing every meeting!! for example, little jonny is jumping off the table, you tell him to stop - risk seen, assessed and actioned!
remembering that marshmallows makes them 'like napalm' acording to someone on here, so making sure clear access to the sink is your risk assessment!
It may be helpful while starting up, too write it all down so you can see the process you are going through