Then you need to be like this guy...... Stop worrying and dont give a ****. You'll never that group of people again in your life so you cares what they think!
https://youtu.be/Uq-9QBUmELA
In my experience the only people who don't like wearing speedo's are those who are self conscious of the size of their penis and those who actually have a small penis.
All depends in which boat you sit really.