Imagine Harry Potter as a bartender. He could be using his skills not just in mixing drinks but also in reading people. Since he has faced so many challenges in his life, he can easily spot if a customer is hiding something or if they are in trouble. His bar could become a place where secrets are shared, and he has to use his wits and magic to keep things in order. He might also have to deal with rival bartenders from other wizarding establishments who are jealous of his popularity and unique drinks.
Maybe Harry is a bartender in a magical bar. He uses his knowledge of potions (from his wizarding past if it's in a Harry Potter - inspired setting) to make drinks with special effects. He could get involved in solving mysteries related to the bar, like why some customers are having strange reactions to certain drinks that seem normal at first glance.
Maybe Harry works in a wizarding bar. He could be using his skills and knowledge to create unique magical drinks for the customers. And perhaps he gets involved in some sort of mystery or adventure related to the bar or its patrons.
Hermione would definitely be a regular. She might come to the bar to relax after a long day of studying ancient spells at the library. Ron would also be there often, enjoying Harry's special butterbeer with extra foam. Hagrid could be another regular, coming in for a large tankard of a strong, warming drink.
A bartender in a Harry Potter fanfic can play a really interesting role. They could be the keeper of secrets in a wizarding pub, like the Leaky Cauldron. They might overhear all kinds of gossip and important information from the various witches and wizards who come in for a drink. They could also be a source of magical items or potions that are not easily available elsewhere, sold under the table perhaps.
Fellow wizards or magic - users could be regulars. They might come to the bar to unwind after a long day of using magic. Some might be there to exchange stories about their magical adventures or to seek advice from Harry, who has his own share of extraordinary experiences. They could include a young wizard just starting out, looking for guidance from Harry, who is seen as a bit of a local legend in the bar.
It could also be that there's a particular customer who is really bothered by the bartender's attempts at friendliness. This customer might be at the bar for some private reasons, like to think over a difficult decision. The bartender's constant chatter makes it hard for the customer, and it leads to a series of events where the other customers get involved, some siding with the bartender and some with the bothered customer.
A bartender can be unique by having special magical abilities related to drinks. Maybe they can create potions that are disguised as ordinary drinks, like a truth - telling ale or a forget - me - not cocktail. This would make them a very interesting character in a Harry Potter fanfic.
The fanfic could center around Harry's life outside of the main events of the books. For example, it could explore his summer holidays in more detail. He could be spending time in the Muggle world and using his magic in creative ways to solve normal, everyday problems. He might use magic to help his neighbor fix a broken fence without the neighbor realizing it was magic. This would add a new dimension to his character and show how he can adapt his magical abilities to different situations.
One possible plot could be that Harry Potter is hired by Sherlock Holmes to help with a case that involves dark magic. Harry uses his knowledge of the wizarding world to uncover clues that Sherlock couldn't find with just his deductive skills.
The plot could involve Harry Potter discovering he has some sort of connection to a dragoness. Maybe he can communicate with her telepathically. They could team up to fight against dark forces in the wizarding world. For example, Voldemort might be after the dragoness for her powerful magic, and Harry has to protect her while also using her strength to defeat Voldemort.