Everyone’s a critic these days.  And with so many apps and websites around, having your say on a bar, restaurant or hotel has never been easier.  But how do you pick your weapon of choice?  Really, what’s the difference between them all?  Well, most of you have probably heard of Yelp.  But what you may not know is that they also organise events and reward their members with something other than a virtual badge.  If you write lots of reviews, you eventually get made into a “Yelp Elite” which gives you access to all sorts of goodies.  I’m not a “Yelper” (as they like to call themselves), but I was…