Hey, my Mom is 73 and she works 3 to 4 days a week at Walmart. She retired at 65 and was so bored, so she went back to work about 3 years ago and loves the extra money too.
Good for her.
My wife met a 73 year old lady working at Hardee's, got to talking to her and found out that she had worked there for 3 years and had never missed a days work.