Though they specialize in natural hair coloring (naturally based, non-toxic, 100% ammonia-free), you can get hair cuts, styling, scalp treatments, reflexology, and I believe manicures & pedicures. I asked the owner and she confirmed that their products are vegan.
As for Green Drinks, it was a great crowd. They served some yummy food too. Only downside that it was quite crowded and noisy, but it had a great turnout! If you want to come next time, check out the L.A. Green Drinks blog.