While there are some limits here (you don't need a pasta maker), asking about having a plunger in each bathroom closet is insane.

Go over and see if you can put liquid plumber or something in it to clear it....take a snake and plunger just in case.

NEW TENANT GIFTSHere's what we give new tenants.....Cleaning Bucket with Cleaning Supplies:white vinegar, baking soda, awesome degreaser, disinfectant wipes, carpet spot cleaner, magic eraser, all purpose cleaner, scrub sponge.Tote Bag with Useful Items and Tools:hand soap, paper towels, plastic garbage bags, toilet paper, toilet plunger, Zip-It (strip for clearing hair clogs from drains), plastic clothes hangers (6), shower curtain liner (good quality cloth one), laundry detergent, dish soap/dish detergent, cutting board, "Freeze the Grease, Save the Drain" kit, “Recycle” bag for collecting materials for recyling, magnet with our name and contact information, picture hangers.Refreshments In the Fridge (for move-in day): several bottles of water, healthy snacks, bottle of sparking cider with a welcome note attached.Larger items: Welcome mat, shoe tray.

A normal clog is handled with a plunger.

Me: did you try a plunger? 

Clogged Sink or Drain   Quick Fix:     - Use a plunger to clear minor clogs

It's common for the sink plunger and trap to pick up hair, soap, and turn it into things that nightmares are made of.

I carry one in my trunk (With a plunger).

Then you may or may not need to push in the plunger to take the other side out.

Tenant shall only use a plunger to attempt to fix a slow or stopped drain, and shall not pour chemical or other drain cleaners into any stopped or slow drains.