The problem here is one of scale.

Most "real life" rooms are not much bigger than 20 feet by 20 feet, butthat's only 4 by 4 squares in DF scale (assuming 1 square is 5 feet).

Miniatures tend to be around 30mm squares tall (sometimes taller) and 'fill' a square. Of course in real life, you should be able to squeeze at least two and maybe up to 4 people onto 1 square but the size of miniatures precludes this. The effect is that miniatures often 'fill' rooms that have 'realistic' (TSR style) proportions. If you think about a modern flat, most of the rooms might only be 10 foot by 6 foot in size....

The answer is to change the ground scale. Make 1 square only 2.5 feet instead of 5 feet. I've tried it and visually it works well. Less claustrophobic set ups and more realistic sized looking rooms in relation to the figures. Of course, the new problem then becomes you need about 4 times as much space and DF to make any given room/encounter.....

You can't win them all! :)

Dave