They may offer very favourable rates, depending on your status. There are also food chains like McDonalds, Kentucky Fried Chicken, Pizza Hut. Tailors abound in plenty, as do fabric shops, so it is easy to get clothes made to measure. Most meet monthly and have Balls throughout the year. For those interested in sport, there are numerous clubs one can join to play badminton, squash, tennis, golf, and soccer.
Some golf clubs are very expensive, but there are plenty which have very reasonable green fees.
There is also The Hash.