"Apt." is a pop, pop-punk, and pop rock song by Rosé and Bruno Mars that's inspired by a popular Korean drinking game. The song is inspired by the South Korean drinking game known as "the apartment game". The song's chorus is based on the game's rhythmic chant of "apateu" (Korean: 아파트; lit. apartment). Re-arranged for concert band.

Instrumentation:

piccolo, 1|2 flute, oboe, bassoon, 1|2|3 clarinet, bass clarinet, 1|2 alto sax, tenor sax, baritone sax, 1|2 horn, 1|2|3 trumpet, 1|2 trombone, bass trombone, euphonium, tuba.

timpani, drumset, xylophone, percussion 1 (tambourine | triangle | cabasa), percussion 2 (clapstick | windchime), percussion 3 (suspended cymbal).