Drinks are an art form at Le Lab. The mixologists are extremely talented and know exactly what to mix together (and what not to).
The drink menu is vast. You can also ask them to whip up something based on your tastes, but I find sometimes that can be a little overwhelming.
I started with a Mai Tai (not your traditional overly sweet kind, but mixed with all the right juices and liquor) and the 1848 (definitely a heavy ginger taste, beware).
Reservations are a must (even for the bar) or you'll be standing. Drinks are pricey, pace yourself.