I did far too many...
College level:
Welfare Committee
Choir
Chamber Choir
Theatre (including being President and Community Officer for a year and two years respectively)
Media Society
Rounders
Nail Art (including being President for two years)
Scholarly Journal
University Level:
Swing Dance
Anthropology
Applied Social Sciences
Kink (including being President for one year)
Student Productions (film-making)
Theatre
It Happens Here
LGBTa
This is all in addition to two regular volunteering roles and other positions held within college that weren't linked to any specific society. Not all of the above were huge commitments, but they took up plenty of time all together!
And about my degree? I still graduated with a 1st..