Rarely a day passes without me learning something from Emacs. Today, it was about a default keybinding that I wsa not aware of all these days of using ERC. In ERC, pressing C-c C-SPC switches to the buffer on which a new conversation has happened.
To have that same keybinding working on rcirc,
(rcirc-track-minor-mode 1) has to be written to ~/.emacs file.