Conclusion
It is worrisome that the downtown Louisville area appears to be an increasingly dangerous place to visit for entertainment purposes. What the crime data did not capture was the time of day that crimes occurred. It may be that with more information it can be discovered what times of the day are safer than others for venturing into certain zip codes.
More work can be done by looking at how the different types of firearm-related crimes are distributed. IN this analysis, this was not done. An armed robbery was counted the same as an illegal handgun possession. Looking at this factor in the analysis might yield some interesting results.
Lastly, it might be that Foursquare and other providers of venue details decide to provide some sort of safety rating as part of their data. Knowing when it is safe to visit different venues could turn out to be a significant factor in patron behavior. However, providing this kind of information wanders close to the border of crime prediction, a controversial topic.