If certain businesses were impacted, where did the demand get displaced to? With restaurants, was it to other restaurants that were more visible or were people

If certain businesses were impacted, where did the demand get displaced to? With restaurants, was it to other restaurants that were more visible or were people more likely to eat at home? If some of the demand for other goods or services, not being a necessity of life as food is, simply vanished, is that a bad thing? Perhaps GDP goes down but efficiency goes up? And what effect does this have on the happiness of the population? These aren't meant to be leading or rhetorical but are interesting to ponder.