At St. Mary's, exams are assigned two rooms: one for "writers" one for "typers". In order to type you have to bring your own laptop with "SoftTest" loaded already.
I've never heard of a professor allowing anyone to take an exam outside the assigned room. There really isn't a "computer lab" per se. Westlat and Lexis each have labs, but the SoftTest software isn't installed on those machines...
Buy a laptop. You'll want one by the end of the semester anyway, you might as well get the benefit for the whole semester.
Okay, I have an old laptop that I just needs the keyboard fixed. But how do I make sure I get all the appropriate software/wireless internet access added? And do we have to pay for that?