I'm coming into GVA at 8am and departing at ~6pm that evening on LX (JK codeshare). What's my best bet for getting to the LX lounge to take a shower after landing before heading out to explore GVA for a few hours? Since I will have two separate tix, I doubt that I'll be able to get my LX boarding pass before landing, and I don't imagine that I'll be able to check-in that early if I leave the secured area.