Vampire bats rendezvous with their friends when dining out

Vampire bats, Desmodus rotundus, hanging out inside a tree. Simon Ripperger Did your school dining hall offer a universally beloved dish? One that attracted long, meandering lines, one that people would immediately line up for without finding a table? (At my school it was hash brown triangles and sweet potato fries.) Maybe you couldn't possibly get there early enough to get yourself a plate—so a contingency plan was to pray you'd run into a friend who was already in line—and then you could share with them...