table arrangements

Today Shan and I were discussing the seating arrangments for the wedding...aiyo what a headache! As usual people did not RSVP in advance (or maybe they're planning to only RSVP at the last minute) and what is more troubling is how difficult it is to seat people who MIGHT have er..."issues" with one another. Is it ok to sit a couple who broke up a year ago at the same table? But if we don't then who should be entitled to sit at our theatre studies class table? We can't choose one friend over another, that's just not right...
Shan spent 4 hours just calling everyone who didn't RSVP to check if they're coming, and even then, half of them said they'll only confirm with us again next week. :(
And then there were people who said that they'd come and then changed their minds again due to other appointments and stuff. sigh.
Also, we were toying with the idea of sitting Praveen's single colleagues at the same table as Shan's unmarried cousins... but we're not sure if it's a good idea. Would it be better for the cousins to sit with family? But they might not enjoy themselves as much anyway because they're mostly in their 20s and the other distant aunts and uncles coming from India to attend the wedding aren't very close to them...
And there are more than 12 main family members when you combine Shan and Praveen's families together, so who sits at the main table?! (there are only 10 spaces, at most can squeeze 12 only) Looks like Praveen's great-grandmother might need to shift to the next table! It's either that or Shan's aunt (who stays with them in the same house, moves to the next table)... aiyo, very political lah...