Since the advent of pooled tips, we do not tip as much extra cash as we used to.. We give a group extra tip to maitre d in BLU or Luminae.. and it depends on MdR on E Class if we stick with one venue..or set of servers
Drink servers get extra per drink and sommeliet at end..I do not think they must share.
Room attendent gets small extra tips ongping l,and at the end..it depends on level of svc..