Quarterly week-end concept

We have this concept with two friends (two wedding witnesses). It happened when all four of us were living in Paris and we thought we didn't see each other often enough. Although we were living in the same city, we couldn't manage to see each other regularly. By chance, it happened we were in a restaurant when we had this thought. Immediately, we decided to get together the first thursday of each month and try a new restaurant, rolling the choice of the restaurant over the four participants. It worked perfectly. Fixing the time is the key thing.
Anyway, when we moved to Toulouse, we could not do this anymore, so we thought of another way of doing it with the new constraints. It had to be a week-end but once a month was too much...
With the four of us, seeing each other every three months was not too constraintful and in a year, we'd roll over the organization.