they do offer a glimpse of real carioca culture but is important to remember that the openness of these areas is relatively young, so tourists should only enter favelas with a guide, or for the sole purpose of joining a recognized favela réveillon bash.

the best way to get tickets and access to private parties hosted in favelas is via favela tour agents, or via the local hostels.

in fact, as schedules are subject to frequent changes, and as english is not widely spoken in the communities, local agents would be able to find the best option for a perfect réveillon in the favelas.