There are still plenty of them: DJMAX, Muse Dash, Spin Rhythm, Hatsune Miku Project Diva, Beatmania. Also there are tons of them on mobile.

You might be surprised to hear that Konami, famed for focusing casino machines, was actually mistranslated on also focusing on arcade machines. There's still a whole rhythmgame scene, but unfortunately it's mostly centered around Japan. That's where DDR, beatmania, Gitadora (the series Guitar Hero/Rockband ripped off) are, including newer series like DanceRush and Maimai and whatnot. If you ever visit the higherscale independent arcades, you might find some unsanctioned imports with some even emulating the online functionality (with gacha, ofc...). Otherwise, your only hope in the states is Round1, which host official imports, and D&B which only has DDR.

To add on to the other commenter, check out Osu!, ADOFAI, Rhythm Doctor, Hifi Rush, and a whole bunch of apps if you don't want arcades.

Check out Clone Hero! I’m away from my computer, but there are archives that let you import all of the Rock Band and Guitar Hero songs. You can use/mod old controllers or even 3D print your own.