The Free Hugs Campaign is a social movement involving individuals who offer hugs to strangers in public places.

Etiquette

Be clean. Have shower on the day, try not to smoke beforehand and dress appropriately.
Put yourself in a good mood. Smile. Positive energy is contagious.
Do not try to convince people to hug you. Try to avoid approaching people but allow them to approach you instead. They will hug you if they want a hug. It should never be forced.
Avoid alcohol and drugs while doing Free Hugs.
Remember to be prepared. Bring a sign or materials to make signs.