I have heard that in other countries, people do just routinely sit together and strike up conversations with strangers. That would be very nice. I enjoy talking to new people and would find that to be a lot of fun. Sure, there are lots of people who enjoy dining solo, but there are a lot of us who would welcome the chance to have some dinner companions, and the introverts would have plenty of other places to choose from.
If someone else wants to steal my idea, go ahead, just make sure that your food is very good, have some healthy options and offer some good wines by the glass. Also, make the food manners-friendly -- nothing that is hard to eat neatly or that splatters. I'll be your best customer.