We speak about restaurants as hospitality businesses serving meals and drinks to patrons at tables. That’s because of liquor licensing. It’s a condition of all restaurant and cafe licences that there are tables and chairs for at least 75% of patrons and that the restaurant serves meals at all times while it’s open.
If you’re not interested in serving alcohol, head over to cafes.
If you want to leave more room for a bar, the restaurant will probably need a general, on-premises or late night (on premises) licence. Be advised: liquor licence fees get expensive. Those licences are at least four times the cost of a restaurant and cafe licence, and vastly more to open later.