An ”It’s a dare!” challenge is initiated by a user, who sends the dare to one or more of his friends. Often the ”low level” dares will be more on the solo activities.
Typical dares could be:
14-day south beach diet
Swim 100 laps
Eat a habanero chili
Take a ”selfie” with your neighbor
Try Chili-Tuna Sushi
Give your boyfriend an unexpected kiss