Sure is. My girls trained in the UK and in the US. We live in Canada. I just emailed the clubs I wanted to go to and let them know about my girls skills. Both times we were.welcomed wonderfully and in the UK they even gave the girls club sweatshirts! I stayed in touch with the UK club and not so long ago the coach joined here as a member, now that was a nice surprise!
As long as you don't sweat it about them working on different skills, other countries may do skills differently or not at all. It is a great thing all around. Make sure you offer to pay, if they don't accept your money please make sure that you send a gift later.