ns-ui / seatmap-ascii-pick

SECTION Cdrag to select a block
— STAGE —
ROW 8
ROW 9
ROW 10
ROW 11
ROW 12
ROW 13
no seats selected — drag across an available block

Drag a marquee across the plan — taken seats and the aisle break the block, and the selection snaps to the longest unbroken run.