I apologise if this has been mentioned here while I was temporarily off Mudcat.
This book is designed for DJs looking for a song on a theme (50-odd songs with "Georgia" in the title etc.)but may be useful for putting together themed gigs.
Jeff Green: Green Book of Songs by Subject. published by Professional Desk Reference. isbn 0939735202 ,July 2002, £37.60 Amazon UK(something over $60 US).
RtS
(you can kick the guy out of the library but you can't kick the librarian out of the guy)