There is a certain amount of red tape organising events at Universities (my basis for this is KCL and Imperial) unless they are either explicitly educational and you often have to liase with security so we've had a lot less friction by engaging tech companies to host meetings. You get the industry links by making use of their facilities, you get students, devs and business types and in all honesty companies in Silicon Roundabout are gagging to look cool and host a meetup.
Saying that, I'm about to start post-doc work at KCL (been here since Undergrad) so I'll be kicking around for the next 3 yrs so I'll be signing up.