Stall bars for stretching, pull ups, L-sits, hanging once a staple in every gym, now usually just used in gymnastic buildings.
I used the plans from that link, except mine are 3 feet wide. His are 4 feet wide. I would worry about the strength going 4 feet. Currently I can walk up mine with my full body weight. They bend a little I chose maple hardwood for the dowels.
Yeah you could pretty these up using better quality wood and staining them. I like raw ugly in my gym at least when I have to pay for it with my money. LoL.