Its a five and a half hour night flight where they are told to minimise activity in the club cabin to promote sleep.
The food and drink service was probably minimal, given the short flight time and the fact that the whole product is geared around people who want to sleep. Most will have eaten in the lounge and be asleep before you reach the seaboard. You really shouldnt see the cabin crew to often from once the mail trays were cleared in until the breakfast starts, and during the welcome PA you would have been encouraaged to visit the galley should you need anything.
You walking to the galley and back with a drink makes two journies in the cabin. A crew member coming to you for an order, heading back to the galley to get it, back with your drink etc doubles that.