Whenever I have a conversation with a drunkened co-worker at a work celebration event, it almost always leads to embarrassing situations for me. I tend to forget that people who have been drinking are usually little more friendly and outgoing than they usually are.
It means the next time I see them I act a little too friendly upon first encounter and it slips my mind that they may not actually remember that we talked for an hour last Friday. Then, for the rest of the minute that my food is heating in the microwave, I have to pretend like everything is totally cool and I always ask people if they got that thing checked out by a doctor.