Walking around money [Slight antedating, 1927]

[Bonnie Taylor-Blake]

OED has 1930 for "walking around money" (in the sense of spending
money), but nothing for "walk around money" (see far below).

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Speakeasies find the going rough, so keen is competition.  They now
have “outside men” who distribute cards of admission and who explain
attractions at resorts employing them.  The solicitors are the slickly
dressed types usually found cracking smart on Broadway curbs.  They
frequent hotel lobbies or rival cafes and by edging into conversation
manage to jockey patrons to their joints.  They receive a commission
on what is spent, in addition to what Broadway calls “walking around”
or expense money.

[From O.O. McIntyre's syndicated "New York Day by Day" column,
appearing in the Waterloo Evening Courier (Iowa), 5 September 1927, p.
4]

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Men thus qualified [to serve as barbers and tailors] can pick up a bit
of "walk around" money on the side after they're enlisted through
Capt. Ralph Bradley, U.S.R., formerly of the Boston & Maine, who's
here, left behind in Room 407, as enlistment officer.

[From The Boston Daily Globe, June 28, 1917, p. 6]

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