Flo Yeow
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They're not the only Enrique Tomas around the city, but they are probably one of the larger ones. There's a sit down dine in area, and also a space for you to grab and go.
Saw a couple having their date when we visited; each had a glass of cava, some jamon in the middle, voila.
They also have sliced and packed jamon, if you're looking to get certain flavors. Taste wise, they're good, but not my favourite unfortunately.