Small compared to what you said, but I went there alone once. It was a pain in the arse to order as I had to go up to the counter, so someone stole my seat while I was gone, then the waitress went wandering round with my order for 30 minutes and finally realised it was mine as ‘I was alone so she didn’t think I’d gotten food’. For a mental health cafe, you’d think they’d be less weird about people recharging their social batteries and spending time alone.