You can't remark upon what you don't know!
Are YOU attending the Jekyll & Hyde Halloween Masque on OCTOBER 31? Feel free to drop thread links here for the perusal of other guests! Be sure to state whether your thread is open or private, and feel free to provide a little summary for completed threads!

Come one come all to the event of the autumnal season: the Jekyll & Hyde Halloween Masque. It is a themed event, where guests are requested to dress in costume, or VE APPROPRIATE COSTUME-LIKE ATTIRE, accompanied by a masque to cover one's face. Nobody will be allowed entry without a masque and certain rooms are enchanted such that masques' cannot be removed. It is up to the guest if they wish to be recognized in their outfit and make friendly, or not and make devious. Rooms are lit accordingly.

At the entrance to the obscure country house, there is a house elf offering two potions to mark entry: one Jekyll and one Hyde. Each guest must select their potion carefully. The effects of each will either bring forth a guest's innermost pleasant desire, or innermost dark desire.* There will be no distinction on the bottles as to which is which, one must simply answer a question and based on the answer the potion will be decided.

Decor is very much in the vein of an opulent country home used primarily for hunting. Jack-o-lanterns and candles are the main source of lighting, while apples, harvest-themed accoutrements and the occasional enchanted scarecrow set the tone. There may be one rather shifty room far from the main hall enticing guests to explore unchaperoned, but that is nobody's business but the hosts. (Also, courtesy of Nolie's splendid brain, all the staff are wearing matching black white checkered joker/harlequin costumes.)

*Warning on the potion bottle in tiny ink: How this desire, sitting in one's belly, is manifested may vary from person to person. Drink responsibly.