Housed in a gorgeous, art deco building, the Porchester is a no-frills spa run by Westminster Council. With a 30m swimming pool, a large Finnish-log sauna, two steam rooms, three Turkish hot rooms and a massive plunge pool, there are plenty of affordable treatments on offer, including massages and male and female pampering/grooming sessions.

It’s women only on Tuesdays, Thursdays and Fridays all day and between 10am and 2pm on Sundays; men only on Mondays, Wednesdays and Saturdays. Couples are welcome from 4pm to 10pm on Sundays.