In case if you don't exactly know the abbreviation PFLAG: parents and friends of gay & lesbian. (Yepp, it lacks a couple of letters T, B, Q, whatever... but only in its name, to tell their defense.) It is a community with a couple hundred thousand members. Actually, it is not only a community but a non-profit organization.
What do they do? As you may probably see in the picture, they celebrate the diversity since they envisioned a society...