Speaking of which, the Tolix stool known as a Tabouret can definitely add some charm to pretty much any bar or counter. It was originally designed for exterior use but its versatility allowed it to make its way inside the house.
The Century chair by Marcel Wanders is produced in two versions: a lounge armchair and a dining chair. Both versions are equally elegant, with black, sculptural feet that bend backward and a short and classy backrest.
Counter-height tables are less common and their style is more casual. This allows them to create a more relaxed atmosphere which could be good for certain types of spaces. Also, they work well in small spaces since they appears to be taking less space because of their height and shape. You can use them in the kitchen where they would double as prep spaces.
Fabric is definitely one of the easiest ways to bring in color and pattern into a space with bar stools. (Spaces that, typically, may be short on both of those design aspects.) Fabric bar stools tend to be comfortable and pretty, although probably the hardest to clean.