What do you call a drummer with no car?

--Informant Info--
Nationality: American
Age: 58
Occupation: Musician/ Composer
Residence:
Date of Performance/Collection:
Primary Language: English
Other Language(s):

Context: This joke was told to over the phone by an older relative of mine

Background: This relative has been teaching music for 15+ years at a small liberal arts college.

Q: What do you call a drummer with no car?
A: Homeless.

The joke is that drummers are typically underemployed, and may have to live in their car.