Hi Jewish Voice,
I hope you're well. St. Stephen's retreat centre was an old motel that the Coptic Churches of the Southern United States purchased. I'm not sure how close the nearest Coptic church is, but there is a chapel on site. I have no clue if they have regular liturgies there or if it's just used when retreatants/conventions/conferences are held there. I believe I have their contact info, so if you need it let me know and I can PM it to you.
Pray for me.