meaning of "room for one more"

[Learning_English]

There is always room for one more at the fireside.

Please explain this sentence. (particularly the bold ones)
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Please let me know if I have made any mistakes in any of my sentences.

[Mister Micawber]

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I just did this for someone (else?) with a different sentence. Double-posting wastes my energies. 'There is always space available in front of the fireplace for one more person (or dog, pot of stew, etc)'.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber