Multiple selection of seats for more than one passenger

[FND]

it'd be nice to support multiple selection for groups of travelers

in theory, checkboxes should Just Work - though we'd have to handle limitations (max. n seats), both client- and server-side

this might be a nice use case for declarative pub/sub:

<input type="checkbox" data-publish="seat-selected">

<!-- ... -->

<p class="status" data-subscribe="seat-selected">
    You've selected two out of three seats.
</p>