I was actually refused entry to the Air France arrivals lounge in 2C a couple of weeks ago on an Economy ticket. I was a bit surprised, because I found the whole lounge access thing really consistent on SkyTeam, unlike the mess that Lufthansa and all that chickenwings stuff is. With the perks of elite status, I never assume I am going to get them, because I have had too many surprises. But if you're in the premium cabins you should get it.