I've dined solo at Palo once for dinner and twice for brunch. It was amazing every time. I received very attentive service. Once it was almost too attentive as the server seemed to feel she had to linger to make small talk since I was alone. I just had to work into the conversation that I was enjoying the chance to decompress and have some alone time. If you are the type of person who is comfortable dining alone, then go for it and you won't regret it.