The subject of collective nouns reminds me of a game we played in the ICU on the night shift: Medical Collective Nouns:
An injection of nurses
A cast of orthopedists
A rash of dermatologists
A shadow of radiologists
A slice of surgeons
A sphincter of protocologists
An arrogance of cardiologists
A void of urologists
A smear of gynecologists

Additions?

a pod of podiatrists

a snoot of rhinologists
a house of ecumenists
a flutter of lepidopterists

EDIT: Sorry, I lost the medical thread in my enthusiasm.

an inspiration of enthusiasts.

an inspiration of enthusiasts.

or

an inspiration of pulmonologists.

A pedal of cyclists

> inspiration of pulmonologists

better!

(and though having to explain something often spoils it, here's the etymology for enthusiasm:
enthusiasm
1603, from M.Fr. enthousiasme, from Gk. enthousiasmos, from enthousiazein "be inspired," from entheos "inspired, possessed by a god," from en- "in" + theos "god" (see Thea).)

A quandry of psychiatrists

an opinion of politicians

Upon seeing a group of ne'er do well students...
A knot of Rhodes?

A function of occupational therapists
A focus of specialists.

a fifth of defendants

LOL

A clot of phlebotomists

A brace of orthodontists

a knot of ropemakers

a congeries of collective-noun collectors

a body of pathologists [stolen from Inspector Morse series]
a strut of surgeons
a space-occupying lesion of medical students
a block of histo-techs
a clump of cytologists

a bolus of geologists

a spoke of wheelwrights