Regarding Microsoft and Sony, I believe that the booths adjacent to their respective main booths (Sony with 4144 and 4044, Microsoft with 4022 and 4012) are theirs as well

The floor plans for E3 2014 have finally been uploaded (last year they were up very early) and can be viewed at http://www.mapyourshow.com/shows/index.cfm?show_id=e314&norepeat=true Last year's floor plans if you wanna compare: http://www.mapyourshow.com/shows/index.cfm?show_id=e313 Note that there are some details missing (the assigned booth(s) listings for respective exhibitor have been deleted from the E3 website, and some booths in the interactive application are marked as reserved).  I took the liberty of naming some of these booths with the larger companies.. Also to note is that the page says E3 2013 in some places, that's just an error/placeholder. Additionally, you can search for product categories and there is some interesting stuff (Gungho (Puzzle & Dragons) has marked Wii U RPG for example).25 days to go!