Welcome to Friend Zone - for a room with broken-heart enemies at the beginning of a Warp Zone-like section
The Endless River - for a wraparound room featuring the "waterfall" background tile (#722 in direct mode)
Inner Visions - for a room where the walls are invisible, perhaps using the enemy sprite that looks a bit like both an eye and a music record
Sloop John V - not sure what this should be, honestly
Vermilion Sands - for a room where you rescue

. If you like, you could use custom assets to make the "vermilion sand" deadly, as the real-life pigment is mercury(II) sulfide...
(insert villain's name)'s Bolero - if you must have an Emerson, Lake & Palmer reference