Diplomacy, while serious, is also about being flexible and adaptable.
Unless both sides hold extremely adversarial positions, it's common for the host to arrange additional activities during a visit to display hospitality. These activities might cater to the preferences of visiting officials, showcase national traditional culture, or present something related to the visit's theme that promotes diplomatic efforts. All are beneficial. For instance, ancient dignitaries often took foreign delegations to visit brothels. In modern times, it's common for foreign leaders to tour the Forbidden City or climb the Great Wall during their visits. When everyone enjoys themselves, conversations tend to become much more pleasant.
This isn't limited to diplomatic delegations; even the military forces of two countries often play sports together during exchanges.
