One of the best amenities you can provide to guests won't cost you a penny extra: Wi-Fi. Since you've already planned that into your monthly utility budget, "splurge" instead on an under-$10 means of sharing it with dinner guests and overnight visitors alike. This cheeky printable is customizable with your network and password. Set it up in a dollar-store frame, and your company will certainly appreciate not having to bug you for the password. Available on Etsy; $6.50.