Taking photos in low light conditions normally implies that you need to use a tripod. But, it is not always convenient and sometimes even allowed to bring your tripod everywhere you travel. For example, you can forget about bringing a tripod to Manhattan.
But at the same time, there are always techniques and tricks you can use to make sure you do not miss a shot when the lighting conditions are not favorable.
Check Gavin Hoey video from Adorama TV where he shares some useful and practical tips how to deal with low light conditions without a tripod.