Requirement for each event vary with the organizer.
Specific age range based on gender is a common restriction for events.
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.
On the other hand, a couple that decides they are incompatible early on will have to sit together for the duration of the round.
Most speed dating events match people at random, and participants will meet different "types" that they might not normally talk to in a club.
There have been several studies of the round-robin dating systems themselves, as well as studies of interpersonal attraction that are relevant to these events.
Because the matching itself happens after the event, people do not feel pressured to select or reject each other in person.
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.
A 2006 study in Edinburgh, Scotland showed that 45% of the women participants in a speed-dating event and 22% of the men had come to a decision within the first 30 seconds.
It also found that dialogue concerning travel resulted in more matches than dialogue about films.