God doesn't want your leftovers. God wants your love overtures, your first-overs, because He is your first love.
The cheese and wine party has the form of friendship without the warmth and devotion. It is a device either for getting rid of social obligations hurriedly en mass, or for making overtures towards more serious social relationships, as in the etiquette of whoring.
Worship is our response to the overtures of love from the heart of the Father.