A few weeks ago I was invited to an "appreciation" dinner hosted by a local civic minded group along with other area clergy types. There was no dress guidance given on the invitation, but it was an appreciation dinner, in the evening and with an invited guest speaker. I wore a suit, tie and cufflinks. If I recall, the speaker (a local tv personality) may have had on a tie. Other than that I was the only one who did. I was a little self-conscious for the evening, and clearly stood out. I probably should have gone with a blazer rather than a suit, but I don't really regret dressing up. The invitation should have said casual attire (or cookout attire.). The danger is coming across as arrogant and stand-offish, which isn't a good vibe to give off. I probably should have known to tone it down a bit I guess.