The winning disco diva or cool cat will receive $200 Free Slot Play. The fun continues Saturday night when polyester, platform shoes and disco music are all the rage for a Disco Costume and Dance Contest. Daddy O’s is open Friday and Saturday night from 7 p.m. Partygoers won’t want to miss Daddy O’s Disco Lounge with a full bar, live blackjack, lounge seating and a happening dance floor. PRIOR LAKE – MA– The Seventies are making a comeback at Mystic Lake with a weekend of disco, live entertainment and a hip lounge for drinks, dancing and more disco.