Raspberry Pi Captive Portal Wifi Router for a LAN without internet.

I'm a DJ that provides karaoke entertainment at bars and restaurants. I use my laptop for these karaoke shows. My karaoke dj program has the functionality to offer my customers the ability to log in to it to view their singers history's on their phones. I have a simple wifi router running with my setup which is never connected to the internet. My laptop and the customers phones both get on a network called "XK Songbook". My laptop always uses a static IP address. ex 192.168.1.100:80 Then the customers get on the "XK Songbook" wifi network. Their IP Addresses are DHCP assigned by the router. Then they go to the address 192.168.1.100:80 to search the songlist and their singer's histories. Right now it's a two step process with two separate QR Codes. I'd like to combine these steps in to a one step QR Code which would get them on the wifi network and direct them to the web interface of the karaoke program running on my laptop. Can this be done? Thanks!