Treadam Barn

Treadam Barn is a gorgeous and well-​restored 15^th-​century barn situated between Monmouth and Abergavenny in Wales.
It’s definitely a rural venue. It seats about 100, and can be hired for all sorts of events: weddings, team-​building, dinners. It’s sometimes booked to host musical performances as well. See the website for pictures and more info about bookings.
I attended a wedding reception here and it was well-​suited for that: some semi-​formalities took place, followed by a dinner and a dance. The Barn provided a fun, rustic location and staff guided all the necessary changes. (Side note: The wedding was for a friend who manages musical acts, including some ‘80s pop stars. Our musical entertainment included synth-​pop hit-​maker Howard Jones and Kajagoogoo bass player Nick Beggs! I can’t promise they’ll show up for your event.)
It is remote, though, and if people are drinking some planning needs to take place to ensure taxis from Abergavenny are booked to show up at the end of the night.