Where to sit people!?

Unlikely to be a problem for me as our wedding will be tiny as I really want to get married this year, but as I’ve been waiting / hoping for this for 10 years so it’s crossed my mind before ?.

I’d sit just a couple of people / pairs that know each other on the same table, maybe on opposite sides, along with some of those who don’t know anyone, then the conversations can start between those knowing each other and others will get pulled into it. I’d also try to group people by interests - maybe those with children / passionate about travel / music geeks etc. A bit idealistic and simplistic maybe but maybe a starting point?