What do you want? And dont say coffee!
IMHO most office drinkers like a mug-sized cup, which means percolator, dripolator, plunger, or long blacks.
Super-autos tend to be over-over-over extracted since people expect a full cup of water through the puck, as weve discussed many times before on cs :o
If you really want to go down the espresso route, I would recommend the usual sunbeam grinder since its doserless (less mess and misuse in inexperienced hands) and reasonable for the small office. Then you need a machine, but that needs to be cleaned, flushed, descaled, etc. But the pair for under $500?
Dont underestimate a good grinder, fresh beans and a good plunger (stay away from woollies, the strainer holes are too big!). Youd be looking at about $200 all up.