Blocks A and B house only the one bedroom beachfront suites. The buildings are named from A - G all the way up the cliffs, starting with A and B down on the beach level near SSB. You won't know which block you'll be in (either A or B since you booked the beachfront room category) until you check in and get assigned your room. There are three floors in A and B so you'll be on one of those floors in A or B.
Courtney, you won't find out your room number or block until you arrive. If, after doing research you decide you'd like a certain "block" you can request it upon arrival, but there is no guarantee. I haven't quite decided if I am going to request D block, or just let the Couples gods reign! lol See you there!
CSS Oct. 2013