They do have a front desk BUT its located a few miles away from the LAX airport. You will have take the free shuttles to all the different car rental places.
There are shuttles that will take you to the facility. I had to wait an hour from the time the shuttle dropped me at the facility until I was allowed to go to the counter.
This is the slowest car rental location I've ever been to.
Thanks! Your answer is awaiting moderation.