http://www.salsavancouver.net
29th - there is a social at urban beat center every wed. predominantly on1, beginners, some intermediate. music is typically 1-5 on a scale of 10
30th - howard johnson. experience could vary from very bad to moderate.
if you are into WCS at all, you might want to go to the event listed at http://www.canadianswingchampions.com/mylestessa2006apr18_029.htm. there is a huge overlap between wcs and salsa community in vancouver, and this even has recently been changed in format to be mixed wcs/salsa.
31st - weekly events hosted by citysalsavibe.com. there is a halloween party at the polish community center (see salsavancouver website). this one is likely to be more fun.
1st - howard johnson again
also, look out for event postings on salsavancouver.net. if anything new comes up, it will usually be posted there.