Puzzle note: A "lock and key" is a padlock in which the overlapping
letters (the "key") also form a word, e.g., coin, Indy, in, Cody.

Context note: the National Puzzlers' League held its annual
summer convention in Newark in 2001. "Tyger" is the pseudonym of
the member who hosted that meeting.

LOCK AND KEY (4, 8, 2, 8) (LEFT, RIGHT, KEY, LOCK)
  (e.g. coin, Indy, in, Cody) (singable)

He's a real Newark man,
Off to con in Newark land,
Making all his Newark plans this summer.

Doesn't have a roommate, true;
Knows not what's he's going to do.
Maybe he can room with you or KEY.

Newark man, please listen:
It's a big town you're missing,
But New York's not half as fun as what Tyger's planned.

He's as smart as man can be;
Chockablock with LOCK is he.
Newark man, come solve with KEY this cryptic.

Newark man, don't worry,
Take your time, no hurry.
Puzzles come just the LEFT without your demand.

Didn't bring a pen or two;
Knows not what's he's going to do.
Can he borrow one from you or KEY?

Newark man, please listen:
There's a RIGHT you've been missing,
But New York's not half as fun as what Tyger planned.

He's a real Newark fan,
Had a ball in Newark land,
Glad he made his Newark plans this summer.
=KRAY, Berkeley CA