One cup, or the whole afternoon. Your call. A free tasting of Thai oolongs, from a light Baozhong through cacao-scented oolong and two contrasting Dong Dings, ending with Mi Xiang Dong Ding.

At 4Seas Nimman, 1st floor, out the back on the terrace. Come any time before 4 pm. No lecture or ceremony, and no need to stay until the end. Bring some food to share and water if you get thirsty; please don’t bring tea.