If you can come up with 9-10 Polish songs, you'll be the hit of the night. I must caution that once you start - if you are good - they'll want more, so split your stuff into two strings of 4-5 songs; that'll tire them out. You should always couple a polka with an oberek and/or a waltz. No Sto lat needed. If they're old Polish they might want the Chicken Dance and the Hokey Pokey. Heaven forbid they want a grand march; You can get by with When the Saints Go Marching In. There are a couple songs that are very traditional for the bridal dance, the veil and the bride dancing with her father. If it's that Polish, do a Google and you'll find all the old stuff out there. There used to be a thin book called 'Polish Wedding Songs' but it's now out of print and I've lost mine. I do have a good collection of Polish music if you need notes. Email me.