When you are talking about people going ot ibox, the ranfgers/celtic rivalry should not be considered. It is not as bad as you assume.
The main problem is that Ibrox is near a dodgy area and you may have more problems with security on a dark night.
Perhaps something like Strathhclyde Uni (next to one of the main train stations) or a suite in the millenium hoel would be better.
or even Glasgow Uni which is next to hillhead underground (only 5 mins from the city centre)
Glasgow also has a motorway going right through the city centre so you can get to either in 10 mins.
I will go to the glasgow event if in te country.