Hippie Dancing

-- Bostonist has never seen more atrocious dancing than we did when we stood outside of Cambridge City Hall last year and watched the slowly flailing arms of a thousand hippies moving in whatever the opposite of unison might be. Tons of fun for people watching. Cambridge City Dance Party, Central Square, 7:00pm-11:00pm. Free.

Bicycle Art

-- Bicycle art is having some sort of renaissance across the country, and you would be remiss if you ignored Boston's contribution to the fad. Ink & Steel exhibits sculptor Skunk's playful recombinations of bicycle parts and other found metals. Also featuring work by Ansis Purins. Space 242, 242 E. Berkeley St., 2nd Floor. 6:00pm-8:00pm. Free with RSVP.

Some Guy Named Josh

-- Some folk singer named Josh Ritter performs tonight. Boston Symphony Hall, 8:00pm. $21-$76.

Band Names You Cannot Pronounce on First Glance

-- Asheville, NC crew Ahleuchatistas make Minutemen skronk for the now. For those who wonder why popular music doesn't have more time signature changes. O'Brien's Pub, 3 Harvard Ave., Allston, 9:00pm. $8.

Class War

-- Poor people in the U.S. still have it bad, and Barbara Ehrenreich is still writing about it. Her latest is This Land Is Their Land: Reports from a Divided Nation. Presented by Harvard Book Store. Brattle Theatre, 40 Brattle St., Cambridge, 6:00pm. $5.

Photo of Josh Ritter by C. Fernsebner.