Friday and Saturday are pools/convention days. You just buy a spectator pass at the door (has been $40 the last couple years) to the main competition hall and have access to the whole thing for the weekend. That includes viewing pools on the main stage, access to enter side tournaments, artists alley, merch tables, and the arcade / game demos section.
Schedule will be out by early next week if you want to know when BBTag top 8 is happening.