@Taj Mall you can walk around then go smoke shisha at one of the cafes like @Diab Cerruti 1881 then grab a bite at one of the food places in the food court
You can go to @Diab Cerruti 1881 in Wadi Saqra or @New Man on Wakalat Street. Those are two places which I know that cater to men with specific and kind of difficult to find clothing measurements