Free is a word that always catches our attention. And, when it’s affixed to words like “live music” and “party,” well, we’re all in.

CrashLine Productions, the people behind Boston Calling music fest (taking over City Hall Plaza, once again, this Memorial Day weekend) recently announced they’d also be behind a weekly summer block party series in Dewey Square, the first of which kicks off tonight. Did we mention that it’s free?

Along with gratis eats and beer (for sale), they’ll also be tapping local bands and DJs to provide the weekly tunes to eat, drink and revel to, which they’ll update on their Facebook page as they slot ’em. (Got any suggestions? Post it to their page; you never know.)

According to the Weather Channel, whose site we’ve been refreshing periodically throughout the day, the weather is supposed to be just fiiine for the inaugural block party, which starts tonight at 5, with music by the Swinging Johnsons.