I went to Uni in Southampton so gutted I couldn't get a ticket for this.
There aren't really any decent pubs near the ground so I would say go to the city centre, its really not that far a walk from there. If you come out the train station and go up the hill you are pretty much there. Standard choice of Wetherspoons/Yates/Slug and Lettuce unfortunately but I always used to see away fans in these bars.
Plus, if any of them dont let in away fans they are all pretty much on one big street so you can easily find another one that will serve you.
If by chance anyone comes across a few spare tickets let me know!