What I usually do is take it in table play and then play 2:1 roulette, black or red only. Pick a color, red or black, and stick with it, wagering table minimum on that one color only. It's a long grind, but you can usually convert 50-75% to cash, if that's your FP thing, converting it to cash.
That's what I usually do, and then stick back into slots anyway, but it's a great way to burn time, have some fun and convert it.
Do not change off the color, don't chase anything. Just pick one. You have ROUGHLY 50/50 to get it right (Yes, I know, '0').
I feel like I won something if I can convert it to cash before losing it