So i was right. Hotkeys. During one of my sessions of rolling my face across the keyboard, ive found that this game HAS hotkeys for all the food and drinks. Its everything between Q key and to the right, and A key and to the right.
Now... its been a while since ive played this, so i dont exactly remember how its done, but instead of looking for stuff on the hotbar, if you can quickly locate which keys call for which drink/food type, then hold that key, hover your cursor over the client... and either click on the client or release the hotkey (you have to try which one).
The same applies for maid functions (care, give number, etc), and i think those are between Z and V keys. With enough practice, you can really be efficient at handling the bar. Good luck.
EDIT: i agree that the whole concept of hovering your cursor to the top right, clicking and holding the mouse button on the stuff you need, dragging your cursor back to the client and releasing it on top of him is REALLY tedious. Part of the problem is with where the bar is located. Would be better to maybe move the bar to the left hand side of the screen (in vertical), instead of where it is now, but thats a design decision for
RareAlexDev to make. The maid stuff is FAR less used, so maybe switching those two bars around would do it?