The ornamental design for a bicyclehavinghammock-style seat, as shown and described.
FIG. 1 is a right side view of a bicycle having hammock-style seat configured according to a preferred embodiment of the present invention;
FIG. 2 is a left side view of the bicycle having hammock-style seat of FIG. 1;
FIG. 3 is a front view of the bicycle having hammock-style seat of FIG. 1;
FIG. 4 is a back view of the bicycle having hammock-style seat of FIG. 1;
FIG. 5 is a top plan view of the bicycle having hammock-style seat of FIG. 1; and,
FIG. 6 is a bottom plan view of the bicycle having hammock-style seat of FIG. 1.
The broken lines showing a handlebar-mounted review mirror and a bicycle kickstand in FIGS. 1 through 6 are for illustrative purposes only and form no part of the claimed design.