Hi Frank, found some info on Chez Paree. Riverboat and Chez Paree must have had the same ownership.

Chez Paree Discotheque (formerly the Glass Crutch), at 179 Kahle Drive (behind the Stagecoach Casino), is depicted in the 1970 Yellow Pages telephone directory for Western Nevada.

The Mother Lode nightclub (formerly the Glass Crutch and Chez Paree Discotheque) is seen at center along Kahle Drive in the early 1970s, across U.S. Highway 50 from the South Tahoe Nugget.