I think you're better off giving yourself one meal to enjoy than a cheat day or night. If I was in your shoes and gave myself a cheat night, I would eat everything in sight and undo a lot of hard work! =)
I would probably eat healthy the rest of the day (no starving yourself - that will make you more likely to make poor decisions later!), put in a little more time working out today and tomorrow, and enjoy your dinner tonight.
Remember, it takes about 3,500 extra calories to gain a pound, so one meal shouldn't make too much of a difference.
Congrats on your success and hard work so far, and I hope you have a great time tonight! =)