After Dark may refer to one of the following:
1) UK hardcore and drum & bass artist Dave Charlesworth (Discogs.com)
2) a Swedish euro disco band
3) a German gothic metal band (now Eisenherz)
4) a British heavy metal (NWOBHM) band metal-archives link
5) An all-male acapella group from Trinity College. After Dark's website.
6) A funk rock band formed in St. Andrews, Scotland
7) An Irish pub band afterdark.com