Calle 57a, bars etc have been addressed a few times but long time ago, may have been pre-Covid.
Parque Bolivar, hooking up with hustlers/rough street trade, the dangers of the area etc have been addressed many times in various threads, including by myself in here :
https://www.gayguides.com/forums/topic/37808-medellin-love-motel-and-escort-angelo-real-25cm/page/2/#comment-339090