The chairs themselves are 19.5" wide at their widest point.

Any thoughts?

Matt

24" is likely a minimum for polite friendly company. Relatives don't
exactly fit this profile. A lot of them should be seated on the curb
outside, eating out of paper bags. ( we're taking about adults) On
the other hand if you do in fact like them, then give them the 24".

Like a prior post, lay out 4 sticks (4 strips of masking tape) 24 OC
on your current table and get 3 adults to sit between them to get the
feel of good spacing.

Pete