I am horrible at these types of puzzles!!! I'll do my best to decode and answer by Tuesday - I'll take any hints my housemates wish to offer!
'PSX JBST TRHF?' YSB WXYWXYZE, CSSJDBV SGZY HF FRZ QHY TDFR ZBFRXIDHIW. 'TZ MSXCE SYEZY HBPFRDBV TZ CDJZE DB RZYZ. D QZF FRHF QCSJZ TSXCE IZCC XI HBPFRDBV, RZ TSXCEB'F MHYZ. D'GZ HCTHPI THBFZE FS FYP KDYZTRDIJP -'
and with a little help, I came up with...
'YOU KNOW WHAT?' RON MURMURED, LOOKING OVER AT THE BAR WITH ENTHUSIASM. 'WE COULD ORDER ANYTHING WE LIKED IN HERE. I BET THAT BLOKE WOULD SELL US ANYTHING, HE WOULDN'T CARE. I'VE ALWAYS WANTED TO TRY FIREWHISKY '