Concerts and Restaurants

Question

Again with the 'lo seileichoo'- what about 'jewish' performers - (assuming there was some group that wrote their own songs and didn't use and profit from psukim) Is the idea of 'performing arts' completely non-jewish, therefore rendering the whole activity assur because of lo seileichoo. This might be a little extended but what about Restaurants - is this also an adapted goyish concept. I know that a Talmud Chocham doesn't eat in public - but what about those of us who haven't got there yet? Thanks.