I'm working for a UK based long haul airline while I finish my flight training. We have between 12 and 18 crew on each of our flights and generally of these there are between 3 and 6 guys. I would say 60-70% of our male crew are gay, but they are a great laugh and most of the time are just another one of the lads! The girls can tell who is straight and who is gay right away and that has never been a problem for me. Don't even think of it as an issue. People will work out who you are very very quickly. You get the occassional passenger (generally some fat lout who is on a stag party or something) who will make a comment but usually I just ignore it, at the end of the day I'm the one that gets to go to a hotel with 12 gorgeous girls at the end of the flight