From the article:

Jay-Z, 36, reportedly had no idea what was happening and partied the night away at a custom-built table in a private corner of the bar.

:hihi: didn't he think..hey there's no white folks here!!

http://www.metro.co.uk/showbiz/headlines/813775-jay-z-in-no-whites-race-row-over-brit-awards-2010-afterparty