Talkin' about warm 'n' cozy, here's some designs of a bachelor's room circa 1900. An excerpt from a description of the time:
'There are bachelors and bachelors, and it would be a task of some little difficulty to decide upon the type thereof for whom the typical bachelor's room should be designed, decorated and furnished. Mr. G.M. Ellwood, designer of A Bachelor's Room, has evidently had in mind that sort of bachelor whom even married men may be allowed at times to envy.
He is evidently a man of means in the first place, of excellent taste in the second. He is probably, indeed, an artist or designer, and his room has to serve as studio and living-room combined. A very charming combination it makes.'
The description goes on to say how the features are such that 'on some chilly winter's night a party of bachelors would find the perfection of cozy comfort." Now really, it may be decades since I was a bachelor, but I remember enough to know that it would not be other bachelors that would keep me cozy on a winter's night.
Never the less, yes, this is a place I could be comfy cozy in.
Above, entrance door from the hall, with figures of knights which support the brackets to the shelf and are considered as sentinels, 'appropriate for an entrance'.
Above, manly oak and mahogany. Below, a tidy book collection flanking decorative peacocks. We do not see a bed among these designs, but let us use our vivid imaginations that it would be the coziest comfort that a bachelor could want for on a chilly winter's night.