Duh, weddings are boring, so we are providing an open bar. We had to make you want to come somehow.
No, just show up and have a good time.
Business Casual (Relaxed Dressy? Dressy Casual minus jeans?) I don't care, something along those lines.
Unfortunately, due to a limited budget, we are not able to extend the invitation to anyone not listed on the invite. We hope that everyone can take this time to relax and celebrate with us.
You are definitely still free to come and celebrate with us! BUT the RSVPs is what I will be using as the official count for food and drinks, so I cannot guarantee that there will be enough food if you do not RSVP.