interface BarService {
    void drink(String beverage);
}

interface Music {
    void play(String tune);
}

interface Vehicle {
    void travel(String place);
}

interface Food {
    void consume(String eats);
}

interface RoadTripper extends Vehicle, Music {
}

interface Eatery extends Food, BarService {
}

interface FineDining extends Food, Music, BarService {
}

interface FullyStockedLimo extends RoadTripper, BarService {
}

class SmoothOperator {

    public void romanticDinner(FineDining restaurant) {
        restaurant.play("violin solo at the table");
        restaurant.drink("white wine in long-stemmed glasses");
        restaurant.consume("duck a l'orange");
    }
}

class TeutonicWarlord {

    FullyStockedLimo ride = new LincolnContinentalLimo();

    public void conquer(String city) {
        ride.travel(city);
        ride.play("ride of the valkyries");
        ride.drink("shots of Jägermeister");
    }
}

class Student {

    Music player = new IPod();
    Eatery bistro = new Cafe();
    
    public void study(String class) {
        player.play("Bach preludes");
        bistro.drink("cup after cup of coffee");
        // ...
    }
}