The Hand Hotel in Chirk (about 15 min walk from moorings by the Bridge pub sign) do a good early doors menu and they normally have one of the Stonehose Cask Conditioned Ale on too.
If you moor just past the tunnel at Chirk going towards Llangollen, the train station is only a couple of minutes away and you can get the train to Ruabon (one stop along) and go the the Bridge End Inn which is a free house and the brewery tap for McGivern Ales.
http://www.mcgivernales.co.uk/page5.html
Check out the opening times before you go as I think its 4 - 11 week days and 12 - 11 at the weekend.
You can do a good pub crawl at Chirk. We normally have a pint in the Hand Hotel, get the train to Ruabon, couple of drinks there. Then get the train back and have a curry in the curry house opposite the Hand Hotel. Then one in the Hand Hotel and one for road in the Bridge.
The Bridge End Inn at Ruabon though does not do food, but you can get good pork pies and scotch eggs.
Cheers
Red2000