So, attendees meet a large number of people in a short period of time, The goal, of course, is to find one or more people with whom you'd like to spend more time on an actual date.
In that case, you then ask participants numbered one to introduce themselves to a two sitting kitty corner from them, and so on until all of the ones and twos have had a chance to meet.
This gives people who are speed meeting a bit of privacy.
Sitting at tables all over the room (or just in two chairs) is preferred so the murmur of the conversations does not interfere with the participants' ability to hear.
This speed meeting icebreaker provides a similar experience for participants at a training meeting or a team building session.
You might even want to think about the activity as corporate speed dating.