Coffee
Branches of Starbucks and the more local Black Canyon Coffee can be found in all the malls and even at the largest BTS stations.
Kaldi
This popular Japanese coffee chain has a branch at MBK, and is an excellent way to refresh after all the shopping. They have the usual coffee, tea, smoothies, juices and soft drinks, as well as small snacks. The best part is that they have a Wi-Fi hotspot, so you can check your mail while sipping a hot cappuccino.
Bars
Hard Rock Cafe
Everyone knows the Hard Rock Cafe, and this is just like the other ones around the globe: rock 'n' roll music all night long, the typical Hard Rock Cafe merchandise and live bands every night. But this is the only one that has a beautiful tuktuk coming out of the exterior.
Brown Sugar
This place is known as one of Bangkok's better live jazz bars. The food and drinks are passable, but the people come here for the atmosphere, which is lively and relaxed. The interior is really chic, but expect to pay for it. Be careful to check the bill as the waiters are known to mess around with it.
Siam Square is not that well-known for its nightlife, as shops tend to close about 22:00 and the area gets pretty silent afterwards. Most visitors head off to Sukhumvit or Silom, but Siam Square does have some relaxing bars on offer.
In the winter time recursively defined in Thailand as "beer garden season", popular beer gardens pop up in front of CentralWorld, serving up cold beer, hot food and loud Thai pop.