Neoclassical Somerset House is hard to miss on the south side of the Strand. Walk through its Edmond J Safra Fountain Court and you’ll arrive at one of its indoor spaces. Seamen’s Hall is our favourite: its corinthian columns and arched windows make a striking space for dinners. There’s also a screening room and plenty of characterful spots for product launches. In summer, the grand terrace overlooking the Thames is a fine spot for receptions.