The English Civil War Society of America (ECWSA) is an American organisation that recreates the experience of fighting within the English Civil Wars. I haven't been to America myself, but the ECWS run joint events with the ECWSA about once a year.
If you are interested in this society, please visit the website for more information.
Information on ECWSA was provided by Capt Bob Giglio, commander of the King's Lifeguard of Foot.