As soon as Cryoto started babbling at the barman, with whatever excuse, Marcus sneaked trough the door into the storeroom, then took a good look around, making sure there's nobody in there.
"Holy!" He thought. "This whole thing is a treasure hole. Hehe."
Then he drew a plastic bag out of his pocket and started carefully placing the bottles of Schnapps, Martini, and all sorts of drinks, into the bag.