easily, it may well be greater perfect to declare "effect of alcohol", and "smell of coffee". however the "apostrophe-s" one may well be the only to apply in any different case. it is in simple terms the greater used way of asserting issues. yoou ought to declare the others, even nevertheless it would sound unusual to every physique who had by no potential heard it reported in the past. and easily, it is beneficial to specify what "effect" you're concerning, no remember if that is not alluded to in yet another area of the sentence. alcohol could have many "area outcomes", no longer the least of which being "drunkenness". table legs and dwelling house door may well be high quality, in case you have been comparing or contrasting them to different forms of legs or doorways. yet "legs on the table" and "door on the dwelling house" look greater organic, despite in the event that they DO take up greater room. "crimson automobile wheel" would not paintings on account which you won't be in a position to quickly tell if the vehicle is crimson or the wheel. comparable with "enormous plane pilot". is the pilot or the plane enormous? it is agreed upon syntax that facilitates us comprehend one yet another without having to describe in a 2nd sentence or word, as a result shortening our discourse.