REI is the company that sells adventure and sports gear.
They have a good collection of bikes to suit every need. Here are a few. Fixies are right for the hipsters who like summer games and want to practice for championships. Tall bikes are for those who like crunchy rides and like to race on track.
Cruisers are for those who use a bike for site-seeing and those with a habit of eating while cycling. Road bike is good for those who like precision and aesthetics in their bikes.
A mountain bike is for those with a nerve for adventure. It is light and hence easy to carry and walk up or down a mountain, on difficult terrains. Cyclocross is for those who like cross country biking and can spend their vacations just biking.
Commuters are for those who like to navigate around the city in a bike and do their bit for their environment.