I know quite a lot of people who have never been on holiday, mianly down down to their economic situation though.
The middle class people I know go on holiday about 2-6 times a year, as most have villas in Spain or Italy or something, and go skiing (don't really see somewhere as a holiday if its cold).
I went with one of mates and his family to their apartment in Italy last year. Most boring week of my life, middle of nowhere, no pubs or anything, and quite frankly it smelt of soup. Spent a week walking around, looking at ruins. wtf, that is not a holiday.