This is actually a very simple conversion. It's all in the paint and garage doors. I have been thinking of doing something more quaint, but this is simple and stylish Converted Garage Living Room Sitting Area - on HGTV
Media Room - Garage Conversion - Idea to keep door for converting back later. Can keep pool table, etc. in front space and make 3 car garage open in back. Store cars in garage except when wanting to use it as a game room.