My current work at Keck includes a program to obtain high resolution spectra of 19th mag giants in the Bootes II ultrafaint dwarf galaxy, Laser-AO/OSIRIS spectroscopy of the core of Terzan 5 and other Galactic bulge globular clusters, to search for central black holes, high resolution infrared spectroscopy of giants within 100pc of the Galactic Center, and abundance and velocity dispersion measurements of M31 dwarf spheroidal galaxies, to constrain their origin and dark matter fraction.