We have decided that we are paying for our rehearsal dinner ourselves, given the fact that neither of our parents has the money to really help (my parents are already paying for all the food at the wedding and his haven't mentioned helping). We are trying to think of ways to cut our budget. One of the things we discussed is alcohol. We have decided that it just isn't in our budget (or that important to us, to be honest) to have an open bar at the wedding. We are just going to do the cocktail hour open bar. However, what about the rehearsal dinner. Can we get away with paying for soda and all alcoholic drinks get paid for by the person who orders them? I am not sure if that is rude or not. Advice please! 
*FYI - Another option we are considering is doing a cookout at my parents house instead of a traditional rehearsal dinner. It will be laid back and maybe more cost efficient. What do you think?