Nothing wrong enjoying the food, just check whether it affects your decision making:
if you are choosing between staying home or going to a dvar Torah, you hesitate and a kiddush after that makes you go – that is fine at some level. But if one shul has a better dvar Torah and another – better food, and you choose food, maybe this is not fine. If you go get “free” food because you are hungry – fine. If you get it because it is tastier than what you wish to spend – then, less so. There are though several agadot about poor people who demanded “stuffed bird” (a delicatessen of Gemora times) and being offered beans instead .. Conclusions seem to be inconclusive, but generally supportive of the demand – one guy choked and died without favoring food, in another case, Rav’s sister suddenly comes in from faraway and brings the stuffed chicken.
Menu