There are several professional choirs (national choir "Latvija", choir of national radio) in Latvia and lots of amateur ones (with various performance levels). Although "Kamēr" is not a professional choir, you should definitely check them out if your interested in choir music.
End of august there is international spiritual music festival (garīgās mūzikas festivāls), organized by national choir "Latvija" (one of few professional choirs in Latvia). Can't get any info on 2011 event now.
Events hosted in rural regions could be much more of an experience, even though the performance level of the choirs will be lower than those of professional ones:
- May 21, 2011., Aloja - choir music festival dedicated to conductors. Various events during whole day, contact for details.
- May 28, 2011., Bauska - choir music festival of senior choirs (elderly people singing)
- June 4, 2011., Dundaga - Kurzeme regional choir festival
- June 11, 2011, Riga - concert dedicated to 810th anniversary of Riga
- June 18, 2011, Mazsalaca - music festival for choirs from rural areas and small towns
- July 2, 2011, Alūksne - choir music festival for choirs from Vidzeme and Latgale regions
- September 17, 2011, Meņģeļi, Ērgļi municipality - 11th meeting of Latvian choir