ALEXI WORTH: COUPLES DC Moore until October 7 (724 Fifth Avenue at 57 Street, 212 247 2111) JOE COLEMAN Jack Tilton until October 4 (8 East 76 Street, between Madison and Fifth Avenues, 212 737 2221)     The girl in Alexi Worth’s “Beautiful Unfinishable Magazine” (all works 2006) crouches in a moulded plastic Eames … Continued