Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: Can't wait to perform 2nite at @CrashTestComedy at #Verns! #yyc #Calgary $5 #comedy #comedian #yycComedy #CalgaryComedy #fun #laughs #live