Open mic at Pegasus with the Green Muse returns on Tuesday The Green Muse Open Mic returns to Pegasus Coffee House from 8 to 10 p.m. Tuesday nights (except the first Tuesday of the month). March 3, 2015 12:52 pm Pegasus Coffee House. The Green Muse Open Mic returns to Pegasus Coffee House from 8 to 10 p.m. Tuesday nights (except the first Tuesday of the month). The open mic is open to musicians, comics, storytellers, poets and anybody else who wants to use the microphone.