The one time I've been in a communal darkroom ( I was giving a quick introduction to "advanced" printing), I brought my own enlarger. I figured that was the safest way to be able to show how to go from raw print to real picture in two hours. Then I wouldn't have to waste time trying to adjust the enlarger, clean the lens, adjust the enlarger, find the exposure, adjust the exposure, firnd the filter settings, adjust the settings, adjust the exposure and so on.