Students also figure into the next demographic variable we considered, which is family and non-family groups in the vicinity. True to form, the census data for ZIP code 80302, with its low restaurant failure rate, show the highest percentage of non-household families (62.14%). Given this area’s restaurant success rate, we conclude that non-house- hold families (unrelated individuals living together, such as roommates) are a contributing factor to the success of res- taurants in Boulder. At the same time, ZIP code 80304, with the highest failure rate (29.27%), had the lowest percentage (32.63%) of renters and concomitantly the highest percent- age of homeowners (67.37%).