When Alan and Chelsea are playing Scrabble, Alan, while adding up his score, claims to have a "bingo" (playing all 7 tiles in a single turn). There is clearly one tile remaining in his rack, meaning he did not have a bingo.
Chelsea is shown in bed with her make-up on. Most women remove their make-up before going to bed. [EDIT]: However, as this is early in Charlie and Chelsea's relationship, it is not implausible that she would want to "look her best" even, maybe especially, when going to bed.