This is the info I got on Jellyrolls:
Jellyrolls -- A sing-along bar, with dueling piano players who take requests. Weekends can be SRO, so try to get there no later than 9! Jellyrolls is open from 7 p.m. to 2 a.m. nightly. There's an $8 cover charge, but no drink minimum. Must be 21.
Jellyrolls is fun if you don't mind not being able to talk to the person sitting next to you and like to drink novelty sized kool aid type alcholic beverages (that seems to be their speciality). The dueling piano guys are fun and if you like odd things such as television theme songs and heavy metal ballads, you'll like this place a lot. If you want a place to relax and talk, this is not the place, but if you're looking to hear a wide range of pop rock, it's great!