The definition of a sit in is any organized protest in which a group of people peacefully occupy and refuse to leave a premises
The owners of these businesses called the cops on the people participating in the sit ins because they thought it was "in the interests of public safety. "
Over all the sit ins were very effective. The WOOLWORTH'S sit in was very effective because the sit in sparked all the other sit ins. There are some moder examples of sit ins. One example is a group of students peacefully sat in front of an ice arena to protest the results of this years election.