Lol, not usually the anthem… But a lot of USSR music, indeed. Right now, especially songs from the time of the Revolution, such as Varshavianka, Red Flag, Tachanka song, and so on. Also music from other socialist countries, mostly the DPRK (I have a huge playlist of Korean music that I like, can give you a link of you want) and the GDR. Also, some US unionist music — do you know “Hold the Fort”?

But I’ll listen to basically anything if it has socialist or progressive lyrics. So, I’m interested in other suggestions.