I don't see why you can't wear a suit with or without a tie if you'd be more comfortable with that. I can't speak for what the attitude is in Europe as I'm from the US (so maybe I'm way off here), but I've worn suits and tuxes even in the past and maybe only one person had a problem with it. And since he wasn't in charge, I just went on my merry way. Or like it was also suggested, button up shirts and pants. Buy men's shirts if they fit you and are more comfortable.