Premise: "A man in a white tank top plays the piano accompanied by someone on guitar."\nHypothesis: "A band is playing in front of a small crowd."\nDo we know that the hypothesis entailed by the premise?
Let's think step by step below.
it is not possible to tell
Two people playing musical instruments doesn't imply that they are playing them in front of a crowd.

.

So, the answer is it is not possible to tell