The ornamental design for a multiple crockbuffetserver, as shown and described.
FIG. 1 is a front perspective of a multiple crock buffet server embodying our design, with the buffet server being depicted as intermediately fragmented along its length so that the claimed design covers a buffet server with at least two oval server bowls variably spaced from one another, with the heated server base unit housing, server control knobs, server lid holders, oval lids received by the bowls, oval liners that receive the bowls, and outer handle surfaces and a radial groove of each bowl being shown in broken lines for illustrative purposes only and forming no part of the claimed design;
FIG. 2 is a rear perspective of the multiple crock buffet server shown in FIG. 1;
FIG. 3 is a top view of the multiple crock buffet server shown in FIGS. 1 and 2, with the lid holders being removed;
FIG. 4 is a front elevation of the multiple crock buffet server shown in FIGS. 1-3, with the lid holders being removed;
FIG. 5 is a right side elevation of the multiple crock buffet server shown in FIGS. 1-4, with the lid holders being removed;
FIG. 6 is a rear elevation of the multiple crock buffet server shown in FIGS. 1-5, with the lid holders being removed; and,
FIG. 7 is a left side elevation of the multiple crock buffet server shown in FIGS. 1-6, with the lid holders being removed.