From the John’s Socials page:

We welcome the newcomers each year in their first week with a Freshers’ Squash, a friendly social for them to meet the mathmos from all years, find out more about the society and our activity, and chat with provided refreshments.

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Freshers’ Squash 2015

Freshers’ Squash 2011

Welcome to all new mathematicians! Our Freshers’ squash is the best way to meet the other mathmos at St John’s College, and promises to be an entertaining and fun-filled evening.