The ornamental design for a seating side, as shown and described.
FIG. 1 is a top, front, left side perspective view of a seating side showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 41s a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The horizontal lines near the bottom of the legs show a change of material from the wood grain above and is a lighter color from the upper part of the seating side, and the fragmentary broken-line disclosure in the views is understood to represent a portion of the article in which the claimed design is embodied, but which forms no part of the claimed design.