Some do not appear to be aware that two abreast take as much room up as a car.
I'm a competitive road and off-road cyclist. I often ride in large (10-20+) groups, and almost always two abreast. And we know that while we are in 2 'files', we take up about as much room as a car would. It's the reason for doing it!
Let me explain... Out on narrow, sh!tty, windy lanes, TOO many times on my own, or in single file, cars squeeze past, and push us into hedges, verges, ditches, bushes... Basically, whatever is on the extreme left hand side of the road (we drive on the LEFT, remember

). And it's blummin' dangerous!
So if we ride two-abreast, it forces cars to overtake us, using a proper overtaking manoever. Not just-gotta-squeeze-past to HOLY CRAP!! ON COMING CAR!! And then shove us into the verge.
I agree, EVERYONE on the road needs to be reasonable, but for the sake of slowing a few cars down for 1 minute, while they wait for a straight long and wide enough to see clearly to safely overtake, is more than worth the horn blasts, and the birds we get flipped at us...
My LIFE or some verbal abuse... Wonder which one I'm gonna choose, ay???
Oh, and this isn't a 'dig' at anyone (apart from you impatient car drivers - if you're reading!!!

). So please, don't try and flame me to a crisp!
