Our main bars have single group espresso machines, so that doesn't help you. Our Rathskeller bar does not. We installed an instant hot water tap behind the stick. Beware. This is one place where you definitely get what you pay for. We spent almost a grand on a separate tap and tank. We also use a hot beverage dispenser similar to this one. You definitely want one with an adjustable thermostat. We've also found that one with an agitator/paddle ideal for milk or milk-based beverages (think hot chocolate).