You buy him a Long Island Iced Tea. 8- Some slurring. Offer to buy drinks for everyone in room. Lots of people say yes. Go round the pub hugging them one by one.
Beer tastes off.
Send it back. Beer comes back tasting same. Fight nausea by trying to play poker machine for ten minutes before seeing out of order sign. Some doubling of vision. Stand on table shouting abuse at all four barmen.