Jonathan,
Squash clubs - the main ones in Basel are:
- Paradies (Allschwil) no website, tel: 061 485 95 84
- Van der Merwe (Allschwil)
www.vandermerwe.ch/
- Forum Sports Centre (city centre)
www.tsag.ch/
- Impulsiv (Otterbach, DE)
www.impulsiv-weil.de
I used to play squash for my uni although I've stopped these days due to a rubbish knee. The leagues at Impulsiv are a good place to start although if you live on the southern side of Basel then getting there and back becomes an issue. The club is literally a stone's throw over the border (#55 bus takes you there).
If there are any other squash players in Basel that would like to meet one evening at one of the easier-to-get-to Allschwil clubs then I'm all ears. If there are enough replies then I'll suggest a date and place...
Cricket -
Basel Cricket Club -
http://sports.groups.yahoo.com/group/baselcricket/
The seasons's over now but there should be indoor training for the winter months at one of the sportshalls in the city centre. Sadly we don't have nets but indoor cricket is a good laugh.
In the summer there's the Swiss league, Pickwicks Cup and various friendlies, so loads of matches to play.
Hope this helps, I'd be interested to hear if there's a regular football meet in Basel,
Cheers,
Simon