Las Vegas insiders are agog this morning with rumors that in the continuing war among rival Strip nightclubs, The Hakkasan Group is about to announce that it has locked up 31-year-old superstar DJ Calvin Harris for a new, three-year exclusive deal on the Strip. The Wicked whisper is that it took a guaranteed $400,000 a night payday for him to continue spinning at Hakkasan in MGM Grand and and the group’s new Omnia nightclub opening this Spring in Caesars Palace.