At Ithaca college, we kept our small
theatre (essentially a black box) in a basic configuration, though in my time there they purchased new seating stands and experimented with a few different configs. The standard config was a
thrust, and actually, usually only one show out of the year was done in the round. The theatre had
HMI work lights,
house lights, as well as some
Source Four PARs that all ran on an architecture system so that teachers who used the space for class could turn lights on and off easy. We always struck all the theatre fixtures between shows.
I would think though, that if you know that you are going to have lectures on a regular basis you might want to set up a basic wash that is easy to turn on that covers where a lecturer might stand/present.