I have to say brown milk was my favourite bus journey tipple. Little bit of coffee in the bottom of the pot, touch of hot water to liquefy it, then add 3 of each brandy, kahlua and drambuie. Top up with mik and put on ice for at least 3 hrs. Always made twice the amount for the long hazardous journeys to the Oberoi in BOM, and that long journey across the mountains in MRU. Always remember one old soak of a CSD falling flat on his face out of the bus at the hotel in MRU after a particularly long boozy journey. The look of horror from some of the well heeled guests remains with me to this day!!
Also always remember that the taxi into certain dry Gulf states seemed to take forever for some reason
