Flavors from around the world converge at Oasis Café, from the grilled lamb and beef of Greek gyros to the sweet chili sauce of Thai chicken. Sandwiches and wraps emphasize organic and natural ingredients, and both meat and vegetarian options are well-represented. Coffee splashes tongues in hot, iced, or blended forms, as in the Oasis macchiato, which swirls caramel and vanilla into double espresso. The aromas of freshly baked muffins and percolating soups drift across the long wood counter and over checkered booths, where diners groove to soft jazz melodies so they don’t have to bridge conversational lulls with knock-knock jokes that might offend people who live in tents.