Generally, a foyer is a small space located near the entrance of a home… Foyers are typically designed to provide a warm and welcoming atmosphere for guests… https://exprealty.com/guides/foyer/#:~:text=A%20well%2Ddesigned%20foyer%20incorporates,to%20...
Alcove “is a recess in the wall of a room or garden”. (Oxford)
Definition from Oxford: a very shallow balcony with a safety railing on an upper story of a building.
Game Rooms don't really need a definition but according to MW: a recreation room especially : one fitted out for the playing of table games merriam-webster.com/dictionary/game room#:~:text=noun,the playing of table games
Parlor: a room in a private dwelling for the entertainment of guests (from MW)
According to Cambridge: used to describe a bathroom that is directly connected to a bedroom, or a bedroom that is connected to a bathroom dictionary.cambridge.org/us/dictionary/english/en-suite