It's a terrible date for someone you've just met. Though it's fantastic if you're already past the interviewing each other phase. It's a short shared experience that requires zero effort. The act of just sitting next to someone for that long can be very intimate.

Also, and I can't stress this enough, you learn if they're capable of sitting quietly for 2 hours. Some people just can't do it, and I've learned that it is a big red flag.