When Bob comes into the hotel room and wakes up Sterling the time of the clock next to sterling jumps from 1:00 am to 12:40 to 12:50.
In the scene with Eric and Beth at the couch at the brunch the boom mic is visible both over head and in the reflection in the window.
In the scene where the two girls are talking in the pink living room, you can see the boom mic go back and forth in the reflection of a mirror on the upper left hand side.