memphis blues again

[Gatorharp@xxxxxxx]

i will be taking a first time trip to memphis from thursday may 8 through 
that sunday morning.  lots of stuff i want to see and do...the stax museum, 
graceland and sun studios chief among those (sun is walking distance from our 
hotel), plus beale street one night (walking distance, as well), and a 
riverboat ride for the wife.
just wondering if there are any open mics anywhere during that time that 
anybody could tell me about.
thanks
steven j gatorman