They go round collecting and delivering bread for food-distribution charity Food From The Heart.
Mr Lee began working with the group in 2003 after reading about its call for volunteers in the newspapers.
Once a week, the couple drive to participating bread shops in the Marina Bay and Raffles City area before delivering two to three bundles of unsold bread to the Happy Villa Community Home for the Elderly in Tanjong Pagar Plaza.
The former hardware shop employee said he would continue with the volunteer work as long as "I'm strong and healthy. Why not?"
Retiring only last year, the father of three grown-up children said it was important to keep the body and mind busy at his age.
He spends his weekdays helping to look after his 16-month-old grandson at his daughter's home in Tanjong Pagar and volunteers with Food From The Heart on Saturday nights: a time slot which is not popular with many volunteers.
But Mr Lee said he had nothing to do anyway and was more than happy to take on the 10pm Saturday slot.
It was also a chance for him and his wife, Madam Rose Quak Geok Lian, 60, to spend meaningful time together, he added.
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