Sometimes after a long week, I just want to unwind and meet up with friends to catch up but I don't always have time during the week. But a fun thing I like to do every now and then is to invite friends over on Sunday night for a casual dinner party. Nothing too formal or fancy just a great way to relax and wind down. Good conversation and plenty of laughs.
You can make it really easy by either a) cooking a quick and simple dish (you can also have friends brings over side dishes (appetizers or desserts) or b) ordering take-out (Chinese, Indian, burgers & fries, etc). A Bonus if you order take-out: you don't have spend all day cooking and all night cleaning, it'll leave you with plenty of time to sit back and relax. The point of the party is to have fun and something that's low key and relaxed will take the pressure off of trying to plan something elaborate just for a fun night in with friends.