I have already commented upon Mixed Usage – Housing Mixed with Small Businesses. I’d like to elaborate. In a bicycle culture shopping needs to be dispersed and decentralized to make it more convenient for neighborhood shopping regarding daily or frequently shopped items for example food. Small Mom and Pop store are good for the local economy because in addition to making good and services close to the community they are frequently owned by local residents and hire locals, usually students, keeping money in circulation withing the community. Such micro-economies are also good for bringing in local tax revenues.
Items not needed daily such as appliance and furniture having them sold in a centralized shopping area is appropriate. Many large items such as TVs can be delivered by cargo bikes. Hardware store can also be centralized as long as common small items are available in 7/11 like stores that carry small emergency or frequently needed items.
It should be noted that these kinds of community shopping areas will likely develop later in the evolutionary process of building a biking community though some small areas can develop as opportunities present themselves.