i say if you need the money, go for it.
figure out how you could work marketing into a potential position in event planning. something like.....i learned some really great design layouts for company brochures, i now know such and such software or something like that. it's usually pretty easy to relate job duties to one another once you look at exactly what you will be doing at this job and at your dream job. maybe you have the possibility to supervise other staff, work with budgets, etc and that could help you out later on. you could also say your goal is to become well rounded in many different aspects of business so that you can be a great asset to your future employer.
