Le Crystal (like Pam Pam) has become somewhat of an institution. The people watching is indeed epic and if you're lucky enough to be sitting there when the clown does his show of taking the micky out of people walking by then you've got the best seats in town! His act is difficult to explain and has to be seen to be believed! Last year he was dressed as an old fashioned gendarme and stopping all the traffic with his whistle (it's a bit like trigger happy TV).
The cocktails in Crystal are about 10 euros each which is pretty normal JLP and their list is superb. They also have large sharing cocktails which are a good novelty (the Kolassas for 4 people is the best). The mojito framboise is my favorite when I go here.
The nibbles which come with the drinks are good but the food that you order isn't. I've only eaten here once and only wanted a snack so wasn't really expecting much. With so many good restaurants in JLP don't go to crystal for food.
Getting a table at crystal is somewhat of a challenge so either go early (and stay all night) or hang around waiting to jump in for a table.
I've been going to Crystal for great cocktails for years and I hope to continue to do so for a longe long time!
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