Classicly

The Cavern of the Shining Ones is a science fiction short story written by Hal K. Wells. 

Don Foster was the youngest of the fifteen, and the only college man in the group. A succession of bad breaks had finally landed him broke and hungry on a park bench, where Layroh found him. Layroh's offer of ten dollars a day and all expenses had seemed a godsend. Foster had promptly jumped at the offer. Layroh's peculiar conditions and rules had seemed trivial details at the time.