Speed dating is a formalized matchmaking process which has the purpose of encouraging eligible singles to meet large numbers of new potential partners in a very short period of time. SpeedDating , as a single word, is a registered trademark of Aish HaTorah. Speed dating , as two separate words, is often used as a generic term for similar events. The earliest documented example of speed dating was by Aryeh Alan and Rena Hirsch of Los Angeles in early who developed speed dating as a solution to the problem of typical single events where "only attractive women and outgoing men have success at the end of the evening". Usually advance registration is required for speed dating events. Men and women are rotated to meet each other over a series of short "dates" usually lasting from three to eight minutes depending on the organization running the event. At the end of each interval, the organizer rings a bell, clinks a glass, or blows a whistle to signal the participants to move on to the next date.