On duty - two always as mentioned above, and quite often a third for "just in case". Off duty - 90% of the time it's still two. The exception would be on vacation somewhere really hot and clothing dictates less - I'd still like to carry two, but just don't have the set up for it.

Yes it is a pain to carry at times, but it's a duty and one happily carried out. Imagine a world where you can't........