A hotel has a suite of a peculiar shape that has in fact been designed in order to warp space, to create a room for an inter-dimensional traveller. A junior member of hotel staff, delivering room service, finds themselves wandering between hotels in parallel realities, in the company of this multiversal tourist, trying to get back to their own reality.
(I just reinvented Doctor Who, didn’t I?)
Maybe a comic book series?
or
A game in which you play and interior designer having to organise furniture in odd shaped rooms to meet increasingly bizarre demands from clients