Answer
All these rules must be applied

It is normal business practice to attend a sports event with one or more clients, but this activity should remain an opportunity to get to know the other person better outside a formal work meeting

This excludes:

- that it be presented as an appeal for a benefit in kind (offered during a negotiation period)
- that it goes beyond the professional sphere and becomes a personal benefit for the client, for example, if he or she shares it with his or her family.