Haml/Ruby/Rails adding an element conditionally?

Haml/Ruby/Rails adding an element conditionally?

I have this code:
- userlist.each do |member|
= render :partial => 'projects/member_small', :locals => { :user =>
member }
And I want to add a div element every two times do |member| occurs. So
basically every two times. I want this:
- userlist.each do |member|
.row
= render :partial => 'projects/member_small', :locals => { :user =>
member }