An adjustable rod assembly includes first and second tubes having first and second arcuate portions, third and fourth tubes of generally straight configurations, first and second end supports, and a tension rod mechanism secured within the third tube. The first tube has a first end, a second opposing end, and a planar surface extending from the second end toward the first end. The first tube is telescopingly received within the third tube and the second tube. The third tube is rotatable relative to the first tube and is rotatably secured within the fourth tube. The fourth tube is secured to the first end support and the second tube is secured to the second end support. The tension rod mechanism rotates with the third tube and has a threaded portion configured to extend from an interior of the third tube to an interior of the first tube.