There are three worthwhile shows tonight, two of them free. I'll look at them in chronological order.

First up at 6pm at the somewhat unheralded Newsong Series @Bryant Park
After Work is OTBKB Music favorite Milton.  As previously noted Milton
is the name of a band (as well as the band leader) playing well crafted roots
rock/americana.  Expect to hear about former girl friends, stars, piano
players and New Orleans.  Milton's 2008 album, Grand Hotel, was one of
that year's best and you cannot go wrong checking out Milton tonight.

Milton, Bryant Park stage at 42nd St. near 6th Avenue (B, D or F to 42nd Street) 6pm, free.

Next at 7pm is Ian Hunter. 
You probably know the name but if you don't you've probably heard the
songs All the Young Dudes, Rock 'n' Roll Queen and All the Way to
Memphis by Ian's original group, Mott the Hoople.  Of course Ian has
been on his own now for a while and has continued writing rock classics
like Once Bitten Twice Shy, Central Park 'n West and Cleveland Rocks. 
Ian has a new album, Man Overboard, coming out in mid-July.  Expect to
rock.

Ian Hunter, River to River Festival at Rockefeller Park (1,2,3,A or C to Chambers Street, walk west to park) 7pm, free.

Finally at 8pm is Camera Obscura.  The band is from Scotland, as are
many indie bands these days, but CO is in NYC often, so often that I've
missed seeing them three times (not tonight though).  You can call them
chamber pop if you like, and they sort of remind me of the 70s group
Renaissance  just a bit, although Camera Obscura is certainly not as
baroque.  So I look forward to see lead singer Tracyanne Campbell tell
us about My Maudlin Career and hear what else Camera Obscura has up its
selve.

Camera Obscura, Webster Hall, E. 11th Street between 3rd and 4th Avenues
(N, Q, R, W, L, 4, 5, 6 to Union Square, walk from station to Webster
Hall), 8pm, $20.

–Eliot Wagner