When Snape overheard Trelawney's prediction he inadvertently set in place events that would cause Voldemort's downfall. However, it seems that both of them were at the Hog’s Head with a view to being hired as teachers.
While of course education is important, it seems at this point the war was all but lost. Voldemort seemed to be in control of vast parts of the country and the Ministry was unable to stop him. "Would Voldemort have won the first Wizarding War?" seems to suggest that the war was all but lost.
Given the number of times in the HP books that parents take their children home and Hogwarts is nearly shut down, it seems strange that at such a time Dumbledore would be actively recruting. I would have thought the school would be all but deserted.
Is this apparent normality in Hogwarts/Hogsmeade at this time ever explained?