Let the Rest of the World Go By (his very favorite)
Shine On Harvest Moon
Quartermaster's Corps
Smile Awhile
Tavern in the Town
I've Got Sixpence
His primary occasions were on ski trips, when friend Harrison Taylor played guitar, and even better in his opinion was when his friend Jeff Herbert was playing our upright piano -- then he proved to have a big memory for 20s and 30s popular songs and would harmonize on them better than I ever could: When the Blue of the Night Meets the Gold of the Day, Lazybones, Old Man River, oh anything.
I think he was a bit surprised when I turned out to be a folkie, but rallied finely, and finding that what I wanted to do more than anything was go on song collecting trips in the south, he took me there two years running. Best memory I have of him.