Using the present participle as an adverbial phrase, "inviting someone into your house" emphasizes the current and ongoing nature of the invitation, adding complexity to the sentence.
Comparative form, "less formal," is used to contrast the formality of hosting a party at home versus at a restaurant, clearly expressing the difference between the two situations.
Modal verb, "can unwind," uses the modal verb "can" to express possibility, indicating that people can relax in a more informal environment.