I'm assuming that you are no longer working at Ruby Tuesday's and would like to find your money. So, assuming all of that is correct, my suggestion would be to simply speak with a manager at Ruby Tuesday's (walking into the restaurant during a slow time of day is your best bet) and explaining the problem. I expect they will have the number of someone at corporate human resources you can speak with to track down your account.
The other option is if you know the investment firm that hold the old 401k (Fidelity, Charles Schwab, Vanguard, etc.) you can call them directly and have them help you track it down via your Social Security number. However, if you don't know the firm that held the account, you will need to find that information out through Ruby Tuesday's Human Resources Dept.
Thanks for your submitting your question. Brightscope is an aggregator of retirement plan information however does not handle your employer or former employer’s retirement plan specifically. If you still have the contact information of the person who handled anything to do with human resources at the company that would be your first place to start for the information you are looking for. Additionally if you run into further setbacks here is a link to an article I wrote on tracking down a 401(k) http://www.brightscope.com/financial-planning/advice/article/24529/10-Ways-To-Find-Your-Old-401K/ I hope all of this helps. Feel free to reach out directly or contact other advisors who post an answer to your query as I’m sure one of us can help. See tax assistance as well to understand the rules there if you make any transactions on your account.