You know you're at the wedding party of a Monty Python fan...

[franceslievens]

When the groom ends his speech with the following announcement: "On the subject of smoking... You are allowed to smoke if the letter "a" can be found in the name of your table. But you are not allowed to smoke if there is also an "r" in the name of your table, unless you are seated in between two women, in that case you can only smoke if..." At this point most of the guests lost track and started applauding, just to drone him out. Of course after that there was smoking. If you don't know what to do, you do as you please.