Think we had this last week.. Get off m1 at meadowhall, under the viaduct and then go down a631 Bawtry road, just after BOC there's the Fairways on ur left. 5 mins drive from there to the ground. One of border terriers pubs
You'll be fine anywhere in Rotherham mate, quite a friendly set of fans. Although, Rotherham is a complete shithole from head to toe so the vast majority of pubs will be rougher than sand paper, I'd stick to a spoons for a 'not as rough' feel.
There's bound to be a Wetherspoons in the town centre, 5 minute walk to the ground. You pass the ground on the train so you can hardly miss it.