If you've been, you'll know what I mean. It wafts up from the metro and consists of: blocked drains 30 per cent. something like burnt paper, about 20 per cent.
Guests should have at least four weeks to consider the invitation before the RSVP-by date, which, in turn, is usually one to two weeks before the wedding (ask your caterers when they need a final count).
As PP said if you invite 150 guests and 140 RSVP yes, you would either have to call some to tell them they can't come, not have enough room for them (both would be very rude), go over your budget.....or whatever your reasoning is for only wanting 125 guests. tend to err on the conservative side, because I know that with our wedding, we want 65 people. If we estimated 20% over that and invited 78 people and everybody showed up, we would blow our budget and we can't afford that.