During a visit to Highgrove, King Charles’ friend asked Prince Harry about
his 'Club H', which prompted Harry to lead her to the door of an underground
room.
Harry shared his experience in his memoir 'Spare', stating that the woman eagerly asked him where Club H was located as she was an avid reader of all the papers. Harry then opened the door and pointed down the dark steps leading to the underground room.
The woman took a deep breath and smiled, exclaiming that it even smelled of weed, although it didn't actually smell like that. The underground room smelled of damp earth, stone, moss, cut flowers, clean dirt, and maybe a hint of beer, which Harry described as a lovely, organic smell.
Despite Harry's assurance that they never did drugs down there, the woman gave him a wink, suggesting that she didn't entirely believe him.