FI and I booked our tuxes this weekend. I got an email from Men's Wearhouse that they were having their Valentine's sale, so we got a pretty good deal. We got $40 off each tux (which we needed, cause the only tuxes that come in a slim fit are the most expensive Vera Wang ones. He looks way better in slim fit and his brothers in the wp are both slim, so it made sense). Plus for every 5 tuxes booked we either got a free suit or a free tux rental.
We have 10 guys in tuxes besides FI, so we get a free suit and we get a free rental for himself! Since we had to get more expensive tuxes for the wp (ushers and dads are in a cheaper tux because we didn't need the slim cut for any of them), we're talking about putting some money toward each guy's tuxes in the wp to help out.
And we got a free tie for booking.

All in all, I think it was a pretty nice deal. Free suit, free tie, free tux rental. You can't do much better than that.