Jazzy D's Soul Notes

We often hear terms like a flock of seagulls or a gaggle of geese but here are some i think might be appropriate elsewhere.

A convenience of local corner shop owners
An absence of waiters
A whored of prostitutes
A mass of priests
A lot of auctioneers
A bout of estimates
A clutch of car mechanics
A rash of dermatologists
A depression of weather forecasters

What would you add?