Speed dating, like all structured singles events, is generally a waste of time.
Mostly every unattached person has dealt with this. The potential invitation to a "singles event" or "singles mixer". It is a chance for unattached people to meet. It's not a general night out at a bar, which has unattached people interspersed with attached people. Everyone here is unattached by...
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Plenty of men showed up to the speed dating events I attended in the past. Plenty of men showed up to the structured singles events that I attended in the past.
Most women are going to complain about shorter than average men. 5'6" and under are insufficient heights for them. Plenty of women complain about 5'9"-5'11" too.