Not that it helps much, but the club was called Drowsy Maggie's, note the possessive case.

I spent a good hour looking for anything that might help your search and have come up empty. There are no set lists or trio names online that I could locate. The only suggestion I have is to try asking people who were at the club during the time you recall. If you think that may help resolve the issue please let me know and I'll dig for some names.