THE PONCA CITY Senior Center is hosting an “Open Mic Jam” on Tuesday, March 10 and Tuesday, March 24 from 4 to 5:30 p.m. The “Jam” is open to anyone 55 or over who would like to sing, play an instrument or listen. The format is “Round Robin” where each person gets to sing or play a song of their choice. Each selection is limited to a maximum of 3 minutes. Volume must be kept to a reasonable level…