Hey Leon, sorry if this is abit late though ill chip in my thoughts...

As Benny have mentioned, it looks like they are moving in co-ordination. Try and give the two characters at the back, different timings of the arms and there walking patterns.

And change their walking pose abit, such as have the one in the back(as he looks abit bigger in mass with muscle i think) a bit of a big chest guy and have his head inline with his body instead of having him hunking down abit...

Just try and give them abit of personality if you can

Also not really fond of camera angle as the chairs are abit blocking most of the characters for half of that part.

Cheers, Marlon