Smith and Whistle is just down the road from Green Park tube and is a lovely cocktail bar in the London Park Lane Hotel.
Expect modern decor with a relaxed atmosphere and decent priced cocktails (£10 each). I was greeted by a lovely member of staff who was still just as friendly even when I told him I was using my Drinki app for a free cocktail.
There is also a small outside area on comfortable sofas or high bar stools.
I had the Mayfair Mystery (Vodka, Jägermeister, szechuan pepper honey, elderflower, chili pepper) which was certainly different to my usual fruity cocktails! Definitely spicy and had a kick but I really enjoyed it. Would recommend for after work drinks and / or a date night!