Let's say you have a website for a social centre where you have people's kitchen once a week, and film nights once a week.
You almost have no other locations to connect to your events, so it makes sense to use a "default location" for your events (Saving data entry typing, mouse clicks etc.).

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Go to -> Events -> Settings -> General Options

-> Event Settings -> Default Location and choose your default location there.

-> Location Settings -> Use dropdown for locations? and choose "yes" there.

Save these settings.

... And now test it ! (Happily forever after etc.)

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By using a default location you can also avoid that people create "new" locations (for the same location) with almost the same name (including typos or small differences) by mistake.