Welcome to Hump Day!  You might know Mantis Toboggan as a Dr. with … uh … let’s say dubious credentials: Danny DeVito’s hysterical and obscene Dr. Mantis Toboggan on It’s Always Sunny in Philadelphia is sheer madness.  But local Valley duo Mantis Toboggan, seems a little more subdued.  Here’s how they describes themselves on Facebook: “Mantis Toboggan is the soul stylings of vocalist Cait Simpson and guitarist Josh Hirst.”  There you have it; they’re performing tonight.  7 p.m. – 9 p.m. Gateway City Arts, 92 Race St., Holyoke. 413-650-2670.

https://www.facebook.com/MantisTobogganMus/videos/276236042782917/