Custom gin-blending, then customary gin drinking

Blend a unique batch of Mother's Ruin at Portobello Road's newly opened Ginstitute, housing London's smallest working copper pot distillery, where patrons can infuse and taste until they've created a recipe that'll be stored on file to be re-distilled whenever they please. Afterwards, they'll get a custom labeled bottle, plus one of the house distillations, and "a martini for good measure", though after a martini, good measuring is a little problematic.