Where should I look when the server is shaking and pouring my drink?
Looking expectantly at the glass, mopping perspiration from my brow, licking my lips? A hard, grinning stare directly at the server? Eyes downcast, my hands lying dejectedly in my lap?
A combination of all of the above except for staring at the person serving your drink. I would recommend keeping licking your lips to a minimum unless you are trying to flirt with them.
Another completely valid option is, glance and smile to whoever else is having dinner with you, if you didn't go alone.