It's the only type of bicycle some people in poor third world countries learn and continue to ride on.

road > road conversion > track

had a paper route from ages 11 to 16 and it was constant line of wrecked huffy bmx and cruisers. tried mtb for a few years and it just wasn't my thing. slow. heavy. (or maybe that was me during that time?) so picked up a swap meet centurian 12 speed when my car became a money pit and i needed an efficient and cheap way around town (sf & oakland/berkeley).

really got into it as cross training for distance running, which is really my true love. but ongoing probs with runner's knee (chondromalacia) had me on the bike more and more. had always wanted to try fixed as a way to improve my pedaling form and build leg strength to help my running. i'm happy to say it works!