Should I use curtains/drapes or leave uncovered?

Long 28' x narrow 15' great room with eating area on one end. The front door and a large 6' wide window are on one end , the opposite end has a sliding patio door 6' and another 6' wide window. The patio end doesn't really need privacy as there are no neighbors and it faces north so no direct sun light, but it feels bare . The front window faces the street and does need privacy at night, but only has about 15" stack back space on either side. Suggestions needed and welcome.
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