Keep Grinding

Playing Rhythm Games Without Their Controllers

Beatmania and beatoraja

Use a regular keyboard or an arcade stick. DualShock controllers aren't ergonomical on difficult notecharts.

Dance Pad Games, e.g. DanceDanceRevolution, In the Groove, Pump It Up, Stepmania, etc.

A keypad suits these games if jumping and stomping annoy your housemates and neighbors. Friday Night Funkin' still sucks, though.

Donkey Konga and Taiko no Tatsujin

You can actually spam inputs faster without bongos or a drum (lol).

DrumMania, DTX Mania, and Rock Band

The gameplay fits regular keyboards and DualShock controllers perfectly.

Groove Coaster, Sound Voltex, and K-Shoot Mania

A twin-stick controller works the most.

ParaParaParadise

If the controller has an analog stick, it's playable.

Pop'n Music

I usually map all of the buttons to a keyboard. A Dreamcast, DualShock, or 8BitDo controller will drive you bonkers in 9-button mode.