At my last residence, I built a very nice, framed out bar using 2x4's and a sheet of 1/2 " oak plywood for the top, wainscoting for the sides. it was 8' long, 2 1/2 feet wide, and 3 3/4 feet tall. It was complete with cabinet space behind it as well as a mounting area for a bar fridge.
But, I sold that house, and the new owner demanded to have the bar, so it stayed with the house.
My dad and one of my best friends helped me build that bar .. . . I miss it so. . .
But anyway, it can be done with good effect. I never did draw anything out or write anything down other than general dimensions. I actually considered putting a tower on it, and, seeing as how I had to give it up with the house, I'm glad I didn't.
My new house came complete with an 8 1/2 ' wet bar, back bar, cabinetry, and a fridge that I converted to a kegerator. So, in the end, I'm ahead. Although I do miss my first bar.