hmm the one on the right with the pump is a good idea, however, get a few drinks down ya and it will soon start to become a phallic symbol lol
the one on the left better, a beer matt?
Beer Matt would be my way to go or a pint glass with some kind of thumb or tick (those are just ideas on instant recognition rather than the final idea), the logos you have though don't really say what it's about though, the problem you will face is for it to become recognisable as a review logo.
Is the website also wanting its logo putting into London pubs as a marketing/pr stunt too?
I would possibly have under the pub ("reviews") so your left with no doubt it's a place to review pubs, get in on the scene kind of thing