I asked the bartender if he could make a drink that tastes like a rainy Sunday.

This joke gets its chuckle from a clever twist on expectations. The setup paints a picture of a patron seeking a sophisticated, perhaps even poetic, cocktail to capture the specific mood of a "rainy Sunday." You're imagining a mixologist pondering complex flavors and garnishes, perhaps with hints of damp earth or contemplative spices. The humor then hits with the punchline, which completely deflates that expectation, offering a comically literal and utterly unappetizing interpretation.

The absurdity lies in asking a bartender to translate a feeling into a flavor, and the bartender's deadpan response highlights the often-mundane reality behind such requests. "Warm water" perfectly embodies the bland, uninspired feeling some associate with a dreary, do-nothing Sunday, while the "sad look" from the bartender adds a layer of shared, knowing resignation. It's a playful jab at both overly-conceptual drink orders and the sometimes-bleak reality of a slow, rainy day, all delivered with a dry wit that bartenders often perfect.