1. Melt about 3 ounces of semisweet or white chocolate in a microwave. (It takes about 1 minute to melt.)
2. Holding a glass at an angle, dip a small portion of the rim into chocolate. Lift slightly, and rotate about 1 1/2 inches. Repeat around entire rim, making sure chocolate swags are the same size. Refrigerate glasses until ready to serve.