The things I usually go for is a cheese board and/or cold meats with gherkins and some bread or crackers. It's substantial enough to fill you up and soak up the booze but not a full meal.
Another option is to buy some pmpernicklel bread. It comes ready sliced. Spread some cream cheese on it then cut into little squares (do the spreading before the cutting, otherwise it all crumbles) Decorate each square with either a slice of gherkin, a slice of tomato, some dill or parsley etc.