Securities Purchase Agreement

Exhibit 10.2

September 2, 2008

Mr. Chuck Mathewson

9295 Prototype Drive

Reno, NV 89521

Dear Chuck:

In conjunction with the execution of that certain Securities Purchase Agreement (the “ Purchase Agreement ”) of even date herewith, by and between Charles N. Mathewson, Trustee of The Charles N. Mathewson Trust dtd. 7/22/92 (the “ Investor ”) and Grill Concepts, Inc. (“ Grill ”), and relating to the sale of shares of Series C Convertible Preferred Stock (the “ Series C Stock ”) and Warrants of Grill, and as a condition of the Investor consummating the transactions contemplated in the Purchase Agreement, Grill desires to evidence its understanding and agreement regarding the nomination of a designee (the “ Designee ”) of the Investor for election to the board of directors of Grill, as follows:

If, at any ti