Living in a retirement community, and being retired, we get a lot of 'invitations' to attend seminars on how to invest our money for retirement security. These 'invitations' always include the inducement of a free dinner, often at a very fine restaurant. We will get about three of these per week. So far, we haven't attended any of these. But, the prospect of eating out at a nice restaurant, free, two or three times a week is very tempting. The question: Even though we would have no plans to do any investing, would it be ethical to still accept the 'invitation' and attend?