The Barmaid worked at the Nogard dna Egroeg Eht (The George and Dragon) on backwards Earth. She was working there when the "The Sensational Reverse Brothers" performed there.
When Rimmer and Kryten found themselves on an Earth where time was running backwards, they needed to get a job. Kryten read an advert from a theatrical agent looking for "Novelty acts". He and Rimmer auditioned as "The Sensational Reverse Brothers" and began performing their act, which consisted of mundane tasks which appeared miraculous and very funny. They quickly became a big hit on the Nodnol pub circuit.
Three weeks later, Lister and The Cat caught up with them at the Nogard dna Egroeg Eht (The George and Dragon). The barmaid un-servied them when gave them empty pint glasses and the gave them back the money for it. After observing the world around them Lister and The Cat realized every thing was backwards. After filling some glasses, Lister and The Cat went backstage to see Rimmer and Kryten. As Rimmer was explaing that they had found their niche in life, the pub manager burst in and started to berate them in angry, backwards speech. Kryten translated this tirade, explaining that they were being fired for starting a fight. The manager promised them that they would never work the pub circuit again.
All this became clear when Lister and The Cat un-ate a pie they found on a nearby table. The owner wasn't happy and a massive brawl (tidy) erupted, involving almost everyone in the pub assembling furniture over each other's heads and removing injuries. After the room had been undemolished, Rimmer realised that the manager had fired them before the fight had started. The Cat un-donated some money at the bar where the Bar Maid said "sknahT" Thanks Where they left the pub Starbug. (RD: Backwards)