O'Neill's Pub in Muswell Hill
O'Neill's is a chain of Irish pubs that are located all around the United Kingdom. The bars themselves do not really stand out. However, one O'Neill's is located in an interesting place: The Muswell Hill franchise in London is housed in a converted church.
The pub building began its life as a Presbyterian church built in the early 20th century. The building still looks like a church from the outside, and there are some interior elements that remain from its holier days, including amazing acoustics. This particular franchise has a good lineup of live music acts that roll through regularly.