In case anyone wasn't aware of the existence, the Open Data Law[1] means that there are lots of fun data sets to play with [2]. Plenty of fodder for data science projects. And if you want to get involved BetaNYC is one of the larger civic hacker communities.
[1] https://www1.nyc.gov/site/doitt/initiatives/open-data-law.pa...
[2] https://opendata.cityofnewyork.us/data/
[3] https://beta.nyc/