Over (a)
A common way of saying "while having/doing" is over (a).
E.g.
Let's talk about this over a beer— Hablemos de esto mientras tomamos una cerveza
We caught up over a coffee— Nos pusimos al día tomando un café
We came to an agreement over lunch— Llegamos a un acuerdo durante la comida
We bonded over a round of golf— Intimamos durante una ronda de golf
