Dubai-based Emirates Airlines was the first airline in the world to put showers in international first class. Even though Etihad, whose home airport is a mere 72 miles away in Abu Dhabi, added showers to their Airbus A380s the Emirates shower suite remains the gold standard.
They also installed a bar at the back of business class. They’re hardly the first airline to do this, but they dedicated significant real estate to the bar. It’s tended throughout the flight, there are snacks and good libations on offer.