Blind Dog Cafe’s Lisa Markuson sells coffee and pastries on Science Club's patio. The pop-up will operate weekday mornings for “a few weeks.” (Fritz Hahn/The Washington Post)

The idea is similar to the original Blind Dog Cafe, explains co-founder Noah Karesh: Find a space that’s otherwise unused during the day and set up shop. In this case, Science Club’s brick patio, with umbrella-shaded tables and free WiFi, becomes an oasis between L and M streets — a place to sit for a few minutes and savor a flaky croissant, rich wheat scone or a bowl of house-made oat granola topped with yogurt while sipping an iced coffee. (The beans come from the award-winning PT’s Coffee Roasters of Topeka, Kansas.)

Karesh says that the food is freshly baked in Science Club’s kitchen, including the moist, gooey chocolate chip cookies.

Blind Dog’s funky charm sets it apart from the nearby chain coffee shops: Plates loaded with croissants sit atop piles of old science books, next to vases of flowers. Every passerby (customer or not) gets a cheery greeting.

The pop-up began Monday and is set to run for “a few weeks,” Karesh said. The Blind Dog’s owners plan to be flexible with what customers want: While the current hours are 7 to 11 a.m., they may extend the hours to offer lunch, if people request it. (Hint, hint.)

Prices are fair: Coffee and tea (iced or hot) cost $3, pastries cost $2 and the yogurt will set you back $5.

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The Washington area’s best weekday breakfasts