Speed dating?

Does anyone know where they do speed dating in london and has anyone tryed it
Answer
pop it into a search engine. my sister went to a lock and key party by speeddater.com i think they were called. said it fun, but as per other comments bloke y people were really after easy bedtime activities. she had a coulpe of nice dates with ok guys tho. and a mate did it years ago, he said it was pretty cool, and from his perspective, was amazed at the number of women trying to drag him home after! i have signed with xfactor (allow profiles) and ditchordate(more friendly), but they keep cancelling events up here in york :(