The crew of the event or club is there for your safety. Are you not feeling well or do you see that someone else is not doing well? Go to the first aid or ask someone from the organization or crew to call the first aid. Everything discussed with medical staff is confidential and will not be shared with third parties. So you can freely tell what happened or what you drank or took. In that case they can help you better. Are you or someone being harassed, is there an argument? Then warn the security or crew. They can address a difficult visitor or kick someone out. Even though security or staff may sometimes look strict or busy, they are there to help you.