The ornamental design for a hookah, as shown and described.
FIG. 1 is a perspective view showing an embodiment of the hookah of the present invention.
FIG. 2 is a bottom perspective view of the invention shown in FIG. 1.
FIG. 3 is a side view of the invention shown in FIG. 1.
FIG. 4 is a side view of the invention shown in FIG. 1.
FIG. 5 is a side view of the invention shown in FIG. 1.
FIG. 6 is a side view of the invention shown in FIG. 1.
FIG. 7 is a top view of the invention shown in FIG. 1; and,
FIG. 8 is a bottom view of the invention shown in FIG. 1.
Oblique lines on the hookah surfaces indicate that those surfaces are transparent. The broken lines shown in FIG. 7 are for purposes of illustrating portions of the hookah that form no part of the claim.