Second Life is a Virtual world, that you create a person and buy clothes and gear and stuff. With that you can roleplay, chat and have fun on all these thousands of different lands people own. Every genre you can think of. there are some that look like fantasy forests, some that are modern. A couple look like Disneyland, Greece, Old Western Towns, Sci Fi ships and worlds, Steam punk, Superheroes Cities, Horror cities, Halloween towns, Wintery worlds. Some lands are reserved just for Hanging out and talking, some strictly for Roleplaying. Some are Adult only.
Some/many of the modern lands have places you can hang out at a night club and talk, dance and they pipe in music from their own online radio stations. Not just music either. Some people do interviews and talk shows. Infact a few years ago Duran Duran did a live performance on Second Life via a radio stations, Will Wheaton and Nathan Fillion have done interviews on SL live. Infact Nathan Fillion admits that he LOVES playing Second Life. Some are meant just for Second Life and some can be connected to the internet so you can listen to then on your computer or Ipod.