Usage patterns
洒落を言うto make a pun/witty joke
He always cracks puns and makes everyone laugh.
洒落がきくto be good at making witty remarks/puns
She's known for being quick with clever wordplay.
洒落を飛ばすto crack a joke/pun
He cracked a joke during the meeting to ease the mood.
洒落な〈物〉a stylish/fashionable thing
That shop has a very stylish interior.
Expressions
しゃれにならないnot funny; no laughing matter; serious