@Biggie: I'm going to agree with Jig on the fact that James probably wouldn't be able to decipher that they've been drugged, much less what kind of drug has been used (and I didn't really have any specific ones to go on, I just put down the effect I wanted them to have LOL). Besides, James couldn't have known how much alcohol the three victims had consumed before entering the ballroom, so for all he knows they could have just thrown all caution to the wind and knocked back some serious damage prior. As for Henry, he might be able to try and pick out what the drug was, but he's probably all too happy to just go with the ride.

And for reference:
Liam: 67
David: 34
Nathalie: 27
Ingrid: 32
Felix: 25

Tudududu, manamana!