I was waiting for my table at Chili's in Santa Maria and a lady who was also waiting was knitting a cabled burgundy sweater. I told her I was going to goof her up by mumbling 'purl, purl' at random moments. She laughed and then we discussed knitting on trains or while waiting in line at amusement parks.
That reminds me of a book I saw called Knitter's Night Out. It made me long for a group of people to knit with once a week.