I’ve found that choosing to eat at the bar of most restaurants is your best bet when dining alone. I’ve run into a number of people eating solo in Cucina Alessa (HB location) at the bar. The staff is friendly, and the folks who choose to eat in that part of the restaurant generally seem open to chatting with each other.
• Silk Thai is the best Thai in HB, and in my experience, all of Orange County. It's surprisingly good for a strip mall off of Beach Blvd, and the owner Sue is lovely.
• Olive Pit is damn good Greek food. There are many options nearby you, like Golden Olive and also Athens West on Main St in Seal…