which gets more traffic?

let see what you guys think ” title=”” class=”bbcode_smiley” />

if someone has a domain slotmachine.com and someone else slotmachines.com
which do you think will get more traffic based only on the keyword in the domain ” title=”” class=”bbcode_smiley” /> ?

would slotmachine rank for slotmachines? besides is it one word or TWO ?

THanks,