On my way over to Lers Ros from Powell St. and O'Farell I noticed a lot of tempting hole in the wall restaurants. In the past I have tried Thai House Express, Osha Thai Noodle Cafe and a Laotian or Burmese place about a million years ago. A few Mexican places caught my eye as well, but I can't remember the names. I skipped noting the Indian places as I eat a lot of Indian food in Sacramento.
Chabaa Thai Cusine
Sai Jai Thai Restaurant
Dong Baek Restaurant
Tian Sing - not exactly the Tenderloin, I walked past it on my way back from shopping. I only found a couple of recent mentions on CH
Pinecrest Diner - in case I need to have a super early breakfast
Senor Sisig - also not quite the TL, it was parked around the corner from my hotel. I was on my way to the TL.
BTW, Lers Ros was great, lived up to the hype. I took a to go menu for delivery during my next visit (I guess I am a little food obsessed I have the home to go menus, the work to go menus and now SF to go/delivery menus.)