A group of people discuss high-end vampire costumes and attend a geek convention. They joke about vampires and study blood groups in a classroom setting. One person claims to be a vampire but is disbelieved by the group until they finally demonstrate their abilities.
Sure, here are the key facts extracted from the provided text:
1. A discussion about a high-end vampire costume in the market priced at 120 units of currency.
2. Mention of a butler costume and comparison to the vampire costume.
3. Description of the vampire costume's features, including fabric and design.
4. Reference to a geek convention and the speaker exploring a castle or similar location.
5. Mention of courses on defense against vampire hunters and related discussions.
6. A humorous scenario involving proving or disproving someone's claim of being a vampire.
7. A humorous discussion about exposure to sunlight and allergic reactions.
8. A humorous dialogue about being a vampire and interactions with other characters.
9. Mention of holy water and its ineffective use against vampires.
10. The story of how someone claimed to become a vampire.
Is there anything specific you'd like to know more about or discuss further?