Hi there, welcome to our forum!
X-Wing is quite a popular game at the club at the moment with several players and at least one or two games being played most weeks. You are pretty much guaranteed to meet a couple of other X-Wing players any night you come along (even though they might be playing something else that evening), so in that respect any date is as good another.
Your best chances for getting a game is coming along to the club and speaking to other X-Wing players, or posting up an 'Organise a game' message like you already have done and asking if anyone is available the week you are planning on attending.
I play X-Wing myself (mostly Rebels but sometimes the other factions) and would be happy to give you a game any week I'm free. I'll be at the club tomorrow from 7:30pm and have nothing else arranged so could give you a game if you are planning on coming along.