Have you ever watched a show or a film that has an underground party or bar? There is a Skins episode that features an underground party/bar and it looks like it'd be pretty cool to go to. I'm not sure if that place actually exists, but the underground bar featured in Bell, Book, and Candle (1958) apparently does. However, I'm not sure if it's as cool as it looks in that film. I love when Jimmy Stewart finds it because of the music and the lit, colorful sidewalk to the Zodiac Club.
I must find one of these underground parties or bars one day! However, I doubt it will be as awesome as the one in Bell, Book, and Candle because Jack Lemmon won't be there playing the bongos. Oh, how I love Jack Lemmon!