Proper, round the table folk music.
All musicians and all styles welcome. Irish, Welsh, English and Scottish, American old time, bluegrass and western swing, French, Yiddish, East European, Scandinavian, Greek, Turkish, Balkan and more.
All abilities tolerated. Swap tunes and songs, meet people and learn stuff.
Or, do what most people do and just get a pint and enjoy the music.
Source: Windmill Brixton website