In small rooms, use armless upholstered chairs such as slipper style, which will allow more space than chairs with arms but will provide a more comfortable, small-scale alternative to wooden chairs.
If your budget won't allow you to buy a pair of matching chairs, purchase one chair and a matching ottoman. Until you can afford the second chair, use the ottoman as a "second" seat by placing the chair on one side of your coffee table and the ottoman on the other side. You'll have two places to sit with the effect of a matching pair.