Tiger Lisa,
I am sorry that you are having this problem. If you are the Tiger Leader, and he is comming to your meeting as the Adult Partner, BSA policy strictly enforces NO alcohol or drugs allowed in the program. Even though he is not drinking at your meeting, he is under the influence while participating. You need to contact your Cub Master and advise him/her of the situation. He/she should in turn, notify the Committee Chair. They should personally meet with this adult and remind him of the BSA Policy of No drugs or alcohol, and the fact that they stand firm on this rule. Most of the time, if handled properly, the adult will have no problem and comply with the rules. If he shows up to another meeting in this condition, to protect yourself, you need to politely ask him and his son to leave. As a Registered BSA Leader, should anything happen to a child, (He stumbles and falls on a child), you would not be protected by the BSA insurance, and could be at risk of law actions from the parents of the injured child. Also, you have the support of your District Executives. These are the "Paid Boy Scouts" who are trained to deal with situatons of this nature.