Pirate adventures
When John opened the door to 221B he noticed a smell that did not belong. Not that unusual smells were unusual in the flat, but this was a different smell; one John knew. Rum. Not even bothering to wonder as he knew the real answer would prove his theory dead wrong, John gave in and called out, "Sherlock, what could you possibly be doing with this much rum?" There was a large collection of bottles on the floor of the flat, some empty, some full. "Sherlock?" he tried again when he didn't get an answer. Probably sulking over something, John thought, until suddenly Sherlock appeared seemly out of nowhere, flying at John with a gleaming saber in one hand and a bottle in the other. He pointed the saber to John's neck.
"Bloody hell, Sherlock, what are doing? And what are you wearing?"
"That's Captain, to you John. And I'm a pirate captain so I'm going to dress like one. And you're my first mate, so you're going to dress like one too!" He tossed John the bottle. "Here, drink that."
"What? Why?" John asked frantically.
"Because it's what pirates do. They drink rum and are terrors of the sea!"
John wasn't quite sure what was going on, but Sherlock seemed to be having fun, and John thought it was nice to see his flat mate smile and act childish sometimes. He also didn't see the harm in a drink or two; it'd been a long day. He gave in and took the bottle, taking a swig of it. Sherlock looked very pleased with himself. After the two friends had worked their way through a bottle or two, they ended up piled on the couch together, in a heap among pirate hats, treasure maps, and there may have been a cutlass somewhere in the pile. Either way, when Lestrade arrived to ask why Sherlock had not been answering his phone, both men were thoroughly intoxicated. Upon Lestrade's entry into the flat, Sherlock hopped onto the back of the couch and promptly demanded that he hand over all of his gold and riches. John found this overwhelmingly hilarious and rather than explaining his behavior to Lestrade, he decided instead to giggle unabashedly. Poor Lestrade was once again reassured that these people were not sane or in any way normal. Not even in the slightest. He could see he wasn't going to get any help from these barbarians in this state. He just sighed and left the flat.
"What shall we do now, John?"
John grinned. "Let's go on an adventure."
*they get drunk together, and consequently dream up some epic adventures, such as a battle with the ship the "Scotland Yard" and their captain Lestrade. Also an appearance from a vigilante of the sea known as The Woman*