Well, I do watch NCIS, so know what you’re talking about ( I love the rules), but I agree that it might be a bit confusing for other guests. I still think you could use it if you tweak it a bit.
Let’s see, you could just have normal numbers for the tables, so when the guest first gets there they see they are on Table No. 4 – simple. They find their table, and then see that the number sign on the table looks like this…
Never take anything for granted
The focus is still on the number, but there’s a little NCIS reference there for your friends that will get it. I added the small reference for people that might enjoy it, but wonder what it’s from.
My only other concern is which rules you choose, and the suitability of them. Some of them are obvious, e.g.
“Never take anything for granted” – a great one for the bride and groom’s table
“Never go anywhere without a knife” – would work well on the cake table (but might look weird elsewhere)
“Never be unreachable” – guestbook table perhaps?
“Never let suspects stay together” – could be funny if used properly – e.g. do you have a certain group of friends that always get up to mischief?
Like I say, I think there is a way for you to use them, but I think you need to make sure they don’t take away from the atmosphere you want to create.
[Ah, have just noticed you saying you weren’t planning on having assigned seating. In that case, I think this would be easier – just have little cards dotted around the room in appropriate places – e.g. cake table, card table as I mentioned. “Never let suspects stay together” at the bar maybe?]