The days are getting slowly colder, so what could heat spirit and soul better than some hot Jazz? Probably the most unusual Jazz Venue of London is hidden underneath this church on Trafalgar Square (Image taken from Wikipedia).
The Crypt of St. Martin in the Field does not only completely modernised housing an excellent cafe and shop, but on Wednesday nights, the Crypt Cafe hosts a long-standing series of Jazz concerts. The line up varies for all tastes and prices are a bargain at normally £3.50 -£12. Concerts start at 8pm every Wednesday. All info, the program for the next weeks, ticket etc. can be found here.
Not into Jazz? St. Martin hosts many other concerts, mostly classical almost every day. Several times per week they will even have free Lunch concerts and their Friday evening Candlelight concerts present seminal classical pieces in a unique atmosphere at reasonable prices. Oh, and you can also stop by the Crypt Cafe any time during the day to escape the hustle and bustle of Trafalgar Square.