FIG. 1 is a front-left side perspective view of a chair chair showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a right side elevational view thereof, the left side being a mirror image; FIG. 4 is a rear elevational view thereof; FIG. 5 is a top plan view thereof; and, FIG. 6 is a bottom plan view thereof.