I wrote a verbose description of what you might see in the rooms, don't even think of using this much detail.
It matters why the patient is in the hospital, because that will determine which floor and hence which Ivs might be hanging.
If the person is there for a disease process , such as GI (gastrointestinal), respiratory, auto-immune, cancer, etc they will be on a general medical or oncology floor or the med/onc unit. You will see a 1 liter bag of Lactated Ringers or 0.9% Sodium Chloride or even Dextrose 5% and NS combo. Some places might have a 4x3 inch white sticker slapped on the bag by the nurse, sometimes crisply, other times haphazardly with a crease in the label because the nurse was in a hurry. In black pen you will see the patient's last name, a date such as 9/15 or 9-15, military time (I.e. 16:30), a number for the rate of the drip, such as 75/hr (it means 75 milliliter per hour), and scrawled initials of the nurse. The label will have other preprinted lines, but a lot of times those are skipped, because they are not as important.
If the person broke a bone from a fall or wreck, or had surgery to remove an appendix or gallbladder, then they will be on the surgical/orthopedic or surg/ortho unit. Same thing, LR or NS hanging, and either a little pump (syringe pump) with a 10 or 20ml syringe in it, attached to the IV pole above the main fluid pump. Refer to MDSchafer's post regarding drugs, but I will add that cefazolin is another common antibiotic for a post surgical patient. These antibiotics usually come in 100ml bags and 250 ml for the vancomycin. This day and age the antibiotic bags will have printed labels. The pharmacist will handwrite an expiration date and initials on the bag. Sometimes the nurse will also, confirming she checked the drug.
Most bag antibiotics are piggybacked into the larger fluid bag. They typically are infused over 30-60 mins, so most likely you will walk in the room and see an IV pump on a pole. At the top of the IV pole, you will see a plastic hook about 6-8 inches long in which your larger maintenance fluid bag is hung on the end of it. The antibiotic bag will be attached to the IV pole above the larger bag; its shorter IV line twisted into the main IV line, but in a port above the pump. Most likely the antibiotic bag will be empty because it was infused several hours ago.
If the person is end of life, then you may see a morphine bag on an IV pump for comfort in their final hours.
The IV lines themselves will usually have a little sticker wrapped around them with date and time hung, date and time expired (72 or 96 hours from hang date) and nurses initials.
I hope this level of detail helps in your research. I did this stuff for 18 years.