what do you say to people who just come to sing and not buying anything

[billyo]

i dont have the time too, the reason i asked was that the bar area where i do my show only has about 70 ppl seating capacity, not including the dining area and sometimes these people will occupy about 2 tables, and i have regulars that comes in after work which i know are big spenders that dont have anywhere to seat..but anyway just wondering what you guys think about it..