I think only the dorms for the junior/seniors are air-conditioned (or sophomore if you're lucky) My son was in Holloway and only needed his fan for a month or so, wasn't so bad he told me.
Here's the residence link:
http://www.depts.drew.edu/reslife/t-b.htm
My last note from Drew said they hoped by 2008, Fall but you know how it goes with construction, time will tell.
ps: I found this link about the dorms in the archives:
http://www.drew.edu/news.aspx?id=7533