all fans do is circulate hot air. essentially you r fucked.
the only solution imo is to invest in white drapes to cover all the windows as dag suggested.
another thing you may consider doing is investigating what breakers are assigned to what outlests, try and locate a breaker that has minimal usage and the outlet is nearby where you can run a proper ac certified extension cord.
what amperage r the breakers. you may be able to get away with connecting a 6 or 8000 btu at a medium setting. i have 1 10,000 btu ac connected to a breaker with 4 computers, 4 amps, processing gear, mixer, a pin spot and a halogen lamp. never a problem and im in an 80 year old building.
r the computers equipped with flatscreen or tube monitors. although it is recommended to connect an ac to a separate breaker, i dončt think 10 computers draw enough current. the worst thing that could happen is the breaker trips.
an 8000 btu may not fully cool the room but it will get rid of that nasty humidity.
"We're not just dancing to have fun-we're dancing for survival. We're dancing to save our lives." PTT