Concepción Tourist Traps

Although it's just anecdotic, don't fall for the first offer to have a lunch in Mercado Central; there are many places to eat around both Freire and Maipu gates, next to the flower stands, but their owners can be quite pushy to drag you to have a meal at their place.
They're not aggressive and are always polite and funny, but tou do better if you can get exactly what you want.

Unique Suggestions: Shop around first, check if there's something of your like (there are places specialized in meat, seafood, traditional cuisine, etc.), and then go for something...which can be sometimes negotiated for a better price, mostly if you are in a group.