/r/machinelearning is okay. Twitter has good conversation as well, if you follow all the ML people. Most researchers are in labs so they usually discuss these

/r/machinelearning is okay. Twitter has good conversation as well, if you follow all the ML people. Most researchers are in labs so they usually discuss these things in person with their colleagues. Also the community is relatively small so a lot of discussion happens at conferences and most people are first or second degree connections.