Dancers and grownup drinks!
Promos. Buy 5 packs get one equal or lesser value for free, within reason. Not like $100 packs. Like maybe $10 and under packs.
A freebie been. Like when people don't want there base or something like that, put it in a box and you can pick out a couple things for free. More for the kids, but available to everyone.
I also used to love the like $1 $2 $5 etc boxes. Back then before jersey cards were a buck each these were cool boxes! Back when pulling any jersey card was cool.
Specials like spends $25 get $5 free store credit, spend $100 get $20. etc.
I do like the trade night idea.
Contest. Like superbowl picks, or stuff like that. Win maybe $10-$25 store credit.
Box busting night/packs. Like where you set of a table or 2 and people buy there packs/boxes and everyone sits there and bust them and they show off there hits and favorites etc. And then they could trade.
Packwars were fun at my old shop. Back when I opens a little here and there. If your not sure what that is, everyone buys a pack (usually the owner gets in as well). And like the owner says lowest batting avg. And whoever gets the card with stat of lowest batting avg then gets everyone's cards. Some might say its gambling but so is opening a pack lol. Then who ever won picks the next thing, like lowest card number or something alone those lines. I lost a lot of good cards this way, and won a bunch of OK things lol. But the way cards are now, some don't even have a pic on them!! lol But im sure there are still brands that work good for this.
Hangout night. Not so much about cards, but like where you just sit around talk sprots or the hobby, maybe bust a few packs etc. Guess you could make this part of trade night or the box busting night.
Pack pull of the week / month / year. Winner gets like $5 buck store credit for the week, $25 for the month pull and $100 for the year. Amounts could be adjusted.
A little deal where you customize mcfarlanes. So it works for the deal, they have to buy there figure there. And put in a fee for paint and supplies. And you make one they don't have and when your done take it home. Would be big with the kids but something I wanted to learn to do but never did. Kinda of a far out type idea, but.
Old school night. Ever shop has those old packs that don't sell for $1 each. Maybe buy 3 get on free on them and everyone bust a bunch of them and see whats cool thats left. And good way to clear them out. You could get a ton of packs and fun for $20 bucks. Try going anywhere and doing something fun for $20!
Ok thats my short list. Now onto my long list. Ok maybe im out of ideas.