There may be a homelessness epidemic, but New York City’s lefty mayor is leaving those in Midtown East on the streets. The city announced in April that the Department of Homeless Services would not renew a contract for Mainchance, a homeless drop-in center at 120 E. 32nd St., after its June 30 expiration. The facility is slated to close that day. “Its clients will be forced to wander the streets, hoping to find shelter at other already crowded facilities in other neighborhoods,” Mainchance says