Most speed dating events match people at random, and participants will meet different "types" that they might not normally talk to in a club.
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.
As reported by the BBC in the Science of Love, it only takes between 90 seconds to 4 minutes of face-to-face interaction to determine attraction, which gives speed dating an advantage over online dating.
While over 100 companies in the US offered speed dating through online registration during the growing of the Internet, between 20 three large speed dating companies emerged with a national footprint in the US, with events in over 50 US cities: Hurrydate, 8Minute Dating and Pre-Dating.
There are many speed dating events now in the United Kingdom, Canada, and the United States.