No, four individual guys.

The four individual guys are partners in the SMLLC.  The SMLLC owns each of the individual office LLCs.

The SMLLC does not pay guaranteed payments to the four partners. 

Each of the four individual guys owns a corporation.  The SMLLC pays a management fee to each of the four guys' corporations.  The corporations each pay salaries to the owners of the corporations.

The SMLLC passes thru income or loss to the four individual guys on K-1's.