If you're a man, carry a purse. not a solid black one, or an all leather one, just a simple light flower pattern, or something in the colors of lavender, soft pink, or a soft yellow. don't go with any neon colors, it would mean you're trying too hard.
carry it over your shoulder, and act normal about it if someone asks you about it, or if someone is laughing about it.
If you're a woman...uh...dunno. there's a double standard with women where they can wear pretty much any article of men's clothing and not get severely harassed about it, or atleast not as much as a man would. Oh, except for wearing a tie. strike that; bow-tie.