Requirement for each event vary with the organizer.
Specific age range based on gender is a common restriction for events.
On the other hand, feedback and gratification are delayed as participants must wait a day or two for their results to come in.
The time limit ensures that a participant will not be stuck with a boorish match for very long, and prevents participants from monopolizing one another's time.
On the other hand, the random matching precludes the various cues, such as eye contact, that people use in bars to preselect each other before chatting them up.
According to the New York Times, participants in speed dating experience an average of 2 in 10 or 3 in 10 matches.
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.
Other studies found speed-dating data useful as a way to observe individual choices among random participants.Contact information cannot be traded during the initial meeting, in order to reduce pressure to accept or reject a suitor to his or her face.There are many speed dating events now in the United Kingdom, Canada, and the United States.Speed Dating, as a single word, is a registered trademark of Aish Ha Torah.Speed dating, as two separate words, is often used as a generic term for similar events.
Pre-Dating was acquired by Cupid.com, but eventually became independent again. The disadvantage is people do not actually meet one another.