Gliese 667

Just about an even 23 light years from Sol and located in Scorpio, this is another triple star system where A and B orbit each other, and the C star goes around the A-B pair.  A and B are both mid-range K class orange dwarfs that come as close as 5 AU from each other; however, this would still allow habitable planets to form in both life zones.  C is an M2V red dwarf, much farther out.  It has a super-Earth (six Earth masses) planet -- in such a close orbit that its “year” is only 7 days long.  A has a low metallicity of 26%; I couldn’t find any information on B's.  No info on how old the system is, either, unfortunately.