 Why did Harvey and Joe have such a large tab and the bar that was ran by Johnson?
When Harvey staggered pontifically into the battered metalloy saloon—the only one on Planetoid 42—his tall, gangling partner was already stumbling out, mouthing something incoherent. "Now do you see, my hot-tempered colleague?" said Harvey as he and Joe picked up buckets that hung on the tank. Johnson's eight-foot son, topped by a massive roof of sun-bleached hair and held up by a foundation that seemed immovable, had obviously been born and raised in low gravity. "You'll find everything you want in the back room," Johnson said frantically, "sulfopyridine, mustard plasters, rubs, inhalers, suction cups—" "Relics of the past," Harvey stated.
 They were unaware of the cost of the water served by the bartender.
 They were unaware of the cost of the water served by the bartender.  They had consumed multiple alcoholic beverages and lost track of how much they had ordered.  Their funds were unlimited and they ordered rounds of drinks for everyone in the bar, including Genius, who had more hands to hold more drinks.  Johnson had over-priced the alcoholic drinks they ordered once he knew they were drunk.