A plebe, like any other cadet, must show courtesy to any woman who addresses him; beyond that the young man must not go during his plebedom.

"Flirtation Week" is close by, but no plebe ever dares to stroll there.
This being the night of the hop, the upper class men were busy with their toilets as soon as they returned from supper; or as many of them were as had arranged to "drag a femme" to the hop.

This is cadet parlance for escorting a young lady to the dance.

However, some upper class men notoriously avoid attending hops.
"It's a fine thing, isn't it," growled Greg that evening, "to take a lot of dancing lessons every week, and then, when the night comes around, to stroll through the company streets and listen to the orchestra in the distance." "I'm not complaining," Dick replied.
"Yet you used to be fond of dancing." "I am now." "Then why don't you yearn to go to a hop ?" "I do.

But see here, Greg.