Over the years I have embraced the many 'technical' fabrics that dominate cycling clothing. For the longer rides that I tend to do, I think that they do work in making the whole experience more comfortable than wearing a pair of jeans and a T-shirt. However, there are times when I have to wear a suit for shorter journeys and this can be quite a thing!
There are possibly three main things to look out for if you do this:
#1 Photos. If in central London (or major city) and tourists are out and about, I have found myself the target of people wanting to take my photograph. Perhaps it is the sight of a chap in a suit, riding a little bicycle that does it but whatever it is, be prepared.
#2 You aren't what you seem to be. I wear SPD shoes even when wearing suit and many cyclists see this and regard you some suspicion, as a bit of a wolf in sheep's clothing perhaps. They have heard of small wheeled folding bikes racing at the Nocturne and BWC. They might have even seen a dedicated Brompton peloton at the Dunwich Dynamo?! Get ready for some looks to suss up whether you will beat them off the lights!
#3 BWC? If you have ever competed in the Brompton World Championships you will know that the top half at least is business attire. If like me you only wear a suit on a Brompton occasionally, you may find that the uncontrollable urge to race takes you over. This will naturally confirm the worst suspicions of #2 and induce people to start snapping away #1.
When the 'C' word subsides you might want to give wearing business attire a go to see whether #1, #2 and #3 apply for you too.
Keep safe people!