Chair fic! Oh, it's wild how something so mundane can become this profound literary device. The themes get surprisingly deep.
First, there's the classic 'Forced Proximity/Sharing' thing. A single armchair by the fire, two characters who hate each other, a blizzard outside... you know the drill. It's all about breaking down barriers through physical closeness when there's literally nowhere else to go. The chair becomes this neutral territory where they have to negotiate space, leading to accidental touching and eventual confessions.
Then you've got the 'Throne as a Symbol of Power' angle, especially in fantasy or royal AUs. Who gets to sit in the big chair? Is it a burden? A prize? The moment a character who's never felt powerful finally claims it, or when a king abandons it for something simpler—that's powerful stuff.
A more subtle one I love is 'The Chair as a Memory Anchor.' A worn-out reading chair that belonged to a lost loved one, or the specific spot someone always sat in. Stories use it to explore grief, nostalgia, and the haunting presence of absence. The empty chair says more than pages of dialogue sometimes.
And of course, the 'Sentient/Magical Chair' trope. It sounds silly, but it's a fantastic vehicle for wish-fulfillment or cosmic irony. The chair that grants a wish, or the one that forces truth-telling, or even just a chair that's weirdly, inexplicably comfortable for only one specific person. It's a fun, low-stakes way to inject magic into a 'normal' setting.