Kelcey Poe of Life Sciences, shown here with fellow dancer Ray Baxter of UC Berkeley, will be one of three Lab employees to perform on April 19, 24 and 25 in "Black Sea Treasures," a special performance of the Westwind International Folk Ensemble, to be held at Cowell Theater at Fort Mason. The troupe of 50 singers, dancers and musicians will interpret the music and dance of Balkan gypsies, Hews, Turks, Ukrainians, Russians and Georgians. The other Berkeley Lab employees to perform with Westwind are Michelle Merritt and John Remenarich. For tickets call (415) 441-3687.