If you're looking for 2hr single tracks you'll be running into looped tracks or very long albums. For a group setting, pizza's reference to boiler room sessions is spot on. Those are dope and pretty safe bets.

I personally, will blast some Glenn Gould Bach Variations [1], or some Sleep Dopesmoker [2] when I really want a long collection of hypnotic sounds to lull me into flow.

[1]: https://www.youtube.com/watch?v=Ah392lnFHxM

[2]: https://www.youtube.com/watch?v=hIw7oeZKpZc (<== will make you feel like an invading Mongol horde)

Here's my go-to playlist

https://www.youtube.com/playlist?list=PL9w0HzJqf-4e6tzKEP6mG...

Spotify has a 'deep focus' playlist that works really well. it's over 10 hours long. Two million people subscribe to it and with good reason.

- death grips

- holy other

- 2814

- 18 carat affair

- lone

- koyaanisqatsi soundtrack

- under the skin

- teams

- hong kong express

- infinity frequencies

- container

- moire

- freddie gibbs

- the velvet underground

+ the billion and a half or so boiler room sets on youtube