OK then it is clear the meeting was extremely irregular because Peter Strzok was FBI and at a much lower level (officially) than Clapper and Brennan. So why would  an FBI agent two levels lower than Comey and one below McCabe meeting in an unofficial location and venue with the Directors of the CIA and National Intelligence ? Strzok is two levels, maybe three, below Brennan and Clapper.  The fact that the dinner occured with McCabe's knowledge is also problematic.