Lyric discussion by robert1124 

Cover art for Laundromat lyrics by Rory Gallagher

"Sleeping in a laundromat" is a metaphor for financial hardship.

The protagonist of the song has been dumped by his girlfriend because of money troubles, but is still alive and kicking and buoyed by the support of his friends:

Come 'round and meet my friends They'll be there with me, With me to the end

The protagonist admonishes his ex about the sometimes cyclical nature of one's fortune:

They say I told you so, Maybe bad times come and go, If you don't know that right now, But then you'll never know.