Oh there's a reason all right. It can be quite a trek from the elevator to your room; which one tends to notice if weighted down with buckets of quarters. ( I haven't run into the problem ) BTW, you can guarantee a room with a view for an additional $25 a night, personally I just cross my fingers.
Entertainment-besides the casino, pool and spa, the Mandalay has a theater, (I saw "Chicago" there) right now they're performing "Mamma Mia!", an Events Center (concerts and boxing) and the House of Blues (concerts), check Mandalay's website for a schedule. A day at the spa or show tickets might be a nice surprise. There's also a shark reef exhibit ( a kind of walk through aquarium) in my opinion, not worth the money. Definitely go to the Mandalay website and sign up for their e-mails, lots of special promotions.
Have fun and good luck

Keep'em flying