I'm waiting to get a usb cord from Amazon that is long enough to stretch from my instrument to my computer.. I've been logging in to jammr while waiting and there doesn't seem to be many musicians logging on. I've only seen A couple of public jams with any players in them. Are there certain times during the day or night that the site has more traffic?

If no one else is online when you join, stay connected and play by yourself for a few minutes. Chances are good someone will join you.

But regarding your question: 12:00 noon PDT is usually a good time. Try it on Saturday!