Posts enquiring about dress tend to come in two forms:
1. Will it be all right if…(like the OP here)? To which the answer is almost always that it will be fine, but you might have more fun in a suit - and that’s not a clause one often comes across.
2. Can I get away with…? To which the answer is usually probably not.
The first is usually from people who want to do the right thing and not offend anybody, the second, often, from people who don’t care.