I don't really buy that "I don't have enough money for a dress and a suit".
You don't feel like spending that money on a dress and a suit and that's understandale. However you
are working for a large multinational, therefore beside the paycheck, some other obligations are involved. "Moral obligations" I call them. And you don't have to comply with them.
But I honestely think you should. Because there will be other occasions, other celebrations, other things and I think it's a shame to be missing out on them.
Don't buy a dress, buy a skirt, a pair of trousers and 2 or 3 blouses that you can switch and you're off the hook for at least one year - (feel free to change the quantities, btw

).
Try to get a likin' to the idea, fancy restaurants are so
not that dreadful. You'd be fitting in the crowd and meeting your collegues and their spouses and guess what... there's a chance you might actually like it.
Hugs,
Twinkles[/b]