Zippia.com has a list of the jobs where people are most likely to be single at age 40, according to Census data.
And it definitely seems like working nights, strange hours, or elbow deep in raw meat are NOT good for settling down...
1. Bartenders, 70% single at age 40.
2. Hotel desk clerks, 66%.
3. Food processing workers, 66%.
4. Brick masons, 66%.
5. Restaurant hosts, 66%.
6. Agricultural food graders and sorters, 65%.
7. Actors, 64%.
8. Flight attendants, 62%.
9. Vehicle cleaners, 62%.
10. Butchers, 61%.