The Hole-in-the-Wall Gang is a joking
reference to any bum that hangs around a cash
machine, ATM, or 'hole-in-the-wall'.
The name comes from
the infamous Hole-in-the-Wall Gang that operated out of Johnson
County, Wyoming during the late 19th century.
Why these beggars ask for spare change
by a machine that'll only provide
notes of £10 or more, is generally not understood.