Mavericks owner Mark Cuban parties hard Sunday

Pittsburgh native Dallas Mavericks owner

cheered on the Steelers at the Public House (18th & Cherry) Sunday night. Cuban arrived alone but was soon having a great time singing, buying drinks for the crowd and doing SoCo and lime shots with loan consultant

and his buddies. Cuban left a $300 tip for the bartenders. The “Dancing with the Stars” alum and his new friends later hit  Delilah’s (100 Spring Garden) where the dancers are always happy to entertain a billioniare such as Cuban who got a neck massage from one of the girls. Cuban and crew sipped Ketel One and the business mogul paid for all on his black AmEx. He's here as the Mavericks are playing the Sixers right now at the Wachovia Center.