I would think that places who have wait staff would not appreciate people taking up tables without ordering since it would directly affect their pay. But a coffee shop that does mostly take-out business may not mind so much having the appearance of a busy, popular cafe.
I do think it's good to be mindful that you are utilizing a business's space and facilities, and they are able to provide these to you by selling food and drinks. So you should try to be a courteous customer and support their business.
I do think it's good to be mindful that you are utilizing a business's space and facilities, and they are able to provide these to you by selling food and drinks. So you should try to be a courteous customer and support their business.