Help me recommend some additions to the bar I work at!

The golf course I work at has a very small bar. It’s a small family business but a really popular local spot, and the owners are close family friends. The customers aren’t expecting anything fancy but the employees often enjoy getting creative with what we can mix up at the bar. Anything new we come up with is usually a big hit. I myself have gotten super into cocktails (especially tiki) with my home bar, so I thought it would be fun to figure out how many options we could add to the bar with the least amount of additions to stock.

Liquors they currently have stocked: Bacardi, Captain Morgan, Tito’s, Smirnoff, Absolut, Tanqueray, Jose Cuervo, Crown, Crown Apple, Dewars, Jack, Jim Beam, Jameson

Soda machine: Coke, Diet Coke, Sprite, Ginger Ale, Lemonade, Soda Water, Tonic

Mixers: Bloody Mary Mix, Cranberry juice

Misc: Limes, Bottled flavored Gatorade, Bottled Ice Tea

In addition to a few basic beers on tap and cans.

Is there any easy/cheap additions I could suggest that would expand our options? I was thinking maybe Pineapple or Orange Juice for a start. I’m looking for things that are cheap and accessible!