Well, this saturday is Riverfest, which has lots of free music of all varieties... http://www2.cambridgema.gov/CAC/Community/CRF_Schedule_Events_2011.cfm?minor
Boston Landmarks Orchestra: free classical music at the Hatch Shell, every Wednesday from July 17 through August 28. That page also lists some other free concerts they do in other locations.
I would also keep an eye on the Armory's event schedule (http://www.artsatthearmory.org/Events/EventsCalendar/tabid/80/cat/5/Default.aspx). In particular, they occasionally have open rehearsals for the Boston Philharmonic there.
NEC has free student and faculty concerts all the time. (Well, not so much during the summer.) http://necmusic.edu/calendar_event
The Folk Arts Center of New England has free outdoor folk and contra dancing in several locations, often with live music. http://www.facone.org/programs/outdoordance.html The kickoff event is a Balkan dance on Sunday June 9th at 2 pm, in front of Au Bon Pain in Harvard Square.
The link I posted above includes two free contras outdoors in Copley Square:
Tuesday July 2, 7:30 pm, with the Free Raisins (http://freeraisins.com/) Tuesday July 23, 7 pm, with Perpetual e-Motion (http://www.perpetuale-motion.com/)
I'll also post any Davis Square guerrilla contras as they are scheduled (unless someone else does it first).
Although...I've gone before to the one in Concord with a friend ( I played chauffeur) and I did not want to dance that night; they let me in for $2, which means you get live music *and* a show :)
The corner at Middle East in central square used to have more free stuff but it looks like they started charging a $5 cover for most things - check out the calendar for free events - http://www.mideastclub.com/corner.html
Plough and Stars between harvard and central has a lot of no cover shows but it'd be nice if their calendar specified http://www.ploughandstars.com/wcalendar/calendar
no subject
Date: 2013-05-30 01:57 pm (UTC)no subject
Date: 2013-05-30 02:05 pm (UTC)Somerville Squeezebox Slam, June 15, Seven Hills Park (behind Holland Street T entrance)
Joe's Jazz and Blues Fest, June 22, Powder House (Nathan Tufts) Park
ArtBeat, Davis Square, July 19-20
ArtsUnion is a variety of free public events in Union Square, often including live music
no subject
Date: 2013-05-30 01:57 pm (UTC)Starting next week, Johnny D's has free shows at 10 pm every Friday.
no subject
Date: 2013-05-30 07:15 pm (UTC)no subject
Date: 2013-05-30 02:08 pm (UTC)Lowell Folk Festival, July 26-28
no subject
Date: 2013-05-30 02:11 pm (UTC)no subject
Date: 2013-05-31 10:46 am (UTC)no subject
Date: 2013-05-31 11:34 am (UTC)no subject
Date: 2013-05-30 02:17 pm (UTC)no subject
Date: 2013-05-30 02:56 pm (UTC)no subject
Date: 2013-05-30 03:45 pm (UTC)no subject
Date: 2013-05-30 04:10 pm (UTC)no subject
Date: 2013-05-31 12:28 am (UTC)no subject
Date: 2013-05-31 11:10 am (UTC)no subject
Date: 2013-06-03 12:23 am (UTC)http://www.berklee.edu/events
no subject
Date: 2013-05-30 02:23 pm (UTC)no subject
Date: 2013-05-30 05:32 pm (UTC)The Folk Arts Center of New England has free outdoor folk and contra dancing in several locations, often with live music. http://www.facone.org/programs/outdoordance.html The kickoff event is a Balkan dance on Sunday June 9th at 2 pm, in front of Au Bon Pain in Harvard Square.
no subject
Date: 2013-05-30 05:48 pm (UTC)no subject
Date: 2013-05-31 06:09 am (UTC)no subject
Date: 2013-05-31 04:24 pm (UTC)Tuesday July 2, 7:30 pm, with the Free Raisins (http://freeraisins.com/)
Tuesday July 23, 7 pm, with Perpetual e-Motion (http://www.perpetuale-motion.com/)
I'll also post any Davis Square guerrilla contras as they are scheduled (unless someone else does it first).
no subject
Date: 2013-05-31 11:32 pm (UTC)no subject
Date: 2013-05-30 06:04 pm (UTC)no subject
Date: 2013-05-30 07:17 pm (UTC)no subject
Date: 2013-05-30 07:53 pm (UTC)no subject
Date: 2013-05-30 07:04 pm (UTC)Plough and Stars between harvard and central has a lot of no cover shows but it'd be nice if their calendar specified http://www.ploughandstars.com/wcalendar/calendar
no subject
Date: 2013-05-30 07:07 pm (UTC)http://clubpassim.org/summer-concert-series
no subject
Date: 2013-05-30 07:23 pm (UTC)no subject
Date: 2013-06-01 04:52 am (UTC)no subject
Date: 2013-06-02 02:06 am (UTC)