Macro that handles placement at different tables

Hi!

I am looking for help on a VBA-macro that will do the following

I have a set of people that I want to meet each other. Lets say there are 12 tables and 60 people. 12 of the people are going to stay at the same table all the time. Let's call them hosts.

Now, I want there to be a number of meetings arranged in which the host is joined by 4-5 people. After a while, everyone except the host will change position.

Ideally, everyone should meet everyone else exactly once. I guess that this is not possible though. The primary condition is that everyone should meet everyone else and secondly, repeat meetings are to be kept to a minimum.

I first thought I could simply do this by hand, using simple COUNTIF functions. However, this proved to be too much work.

Any help appreciated! Thanks!