new.html.erb

<%= form_for @order, html: { class: 'form-horizontal well' } do |f| %>
  <fieldset>
    <legend>I want to order!</legend>

    <div class="control-group">
      <%= f.label :place, class: 'control-label' %>
      <div class="controls">
        <%= f.text_field :place %>
      </div>
    </div>

    <div class="form-actions">
      <%= f.submit 'Order!', class: 'btn btn-primary' %>
    </div>
  </fieldset>
<% end %>