Lots of cafés and restaurant in Tokyo have seating designed for just one person. It's usually a cozy spot in the corner. It's not uncommon at all to go to cafés alone. Many people study, read, or just quietly sit. I feel like bars are a place where people go to socialize. Anyways, I'm happy for him. Some people never feel comfortable being alone. I personally view solitude as a key factor in my creative and personal growth. Even better when it's in nature.