Hi Roobarbpie!
Unfortunately I am kind of committed to first and third Fridays at this point. Shame that day doesn't suit you All our events are listed on the website: http://www.sheffieldmegroup.co.uk/ Other people also do drop-ins in other locations at other times, and there are various other events too! I would check those times for you but the website seems to be down just at the present moment.
For anyone else who is interested, my drop-in is at Barretts@235 in Crookes, and the next one is on Friday October 18th from 2.30-3.30.
Gen.