| Clue | Source | Date |
|---|---|---|
| *Spending limits | Wall Street Journal | 12 Jan 2023 |
| Drive-in servers | Eugene Sheffer | 24 Oct 2022 |
| Drive-in servers | Eugene Sheffer | 24 Nov 2020 |
| Servers at Sonic restaurants | USA Today | 15 Mar 2019 |
| Retro waitstaff | ||
| Servers at Sonic restaurants | ||
| Drive-in servers | Wall Street Journal | 03 Dec 2016 |
| Sonic employees | LA Times Daily | 26 Aug 2016 |
| Sonic employees | ||
| Drive-in employees | ||
| Servers at drive-ins | ||
| Drive-in employees of old | ||
| Early fast-food employees | ||
| Some '50s employees | ||
| Drive-in waitpersons | ||
| Early fast-food employees? | ||
| Drive-in personnel | ||
| Certain waitresses | ||
| Outdoor waiters. | ||
| Some waiters. | ||
| Waiters of sorts. | ||
| Waitresses at drive-ins. |