Seconding the recommendation for Warwick Snow, ski tour is a blast!!
Just saw this thread and thought I'd chip in about Mixed Netball - I was a member of the club last year. The clubs got a great vibe, they're big into their socials, particularly circling, a Warwick 'institution' where sports clubs have pre-drinks before a club night which means a couple of weeks down the line you're going out with 30+ you really like. Sounds like you'd like the sporting side too, training twice a week where you can do as much or as little as you want, most people tend to go to one session but some members are purely social or sporting. As for the guys thing, you're at uni, no-one cares what you do and I'd basically describe it as a kickaround in the park with your mates, except some of them happen to be girls.
Hope this didn't sound like too much of a sales pitch but MN really made my year, feel free to ask away if you have any questions