So a bunch of coworkers and I go out to Denny's every Saturday night. Some of us order food, some of us just drinks, we mostly just hang out and wind down at the end of the night. We have one waitress that we always request (and get) because she's the only young person there, she'll chime in on our conversations from time to time, she always does a great job, and overall our whole group really likes her. She's friendly with everyone but tonight she kept trying to make physical contact with me as much as possible. She put her hands on my shoulders like she was going to give me a massage and I was like "oh sweet I get a complimentary massage with this meal", just joking like the whole table always does. Didn't really think anything of it. When our food came she served me, the girl across from me, the guy diagonal from me, and the girl next to me, all from my side. Her boobs grazed my shoulder at least twice and she'd gently run her hand on my shoulder / back as she was walking away almost every time. When the bill came I took it because I always end up being the one to tell people how much they owe. I was reading over it and she put her chin on my shoulder and was like "Is everything ok on it?". I didn't flirt back at all besides the first remark I made early on, but I don't want to give her the impression I'm interested. We'll probably still be going there every Saturday (as we have been for about 2 months now) but I don't want things to continue like they did tonight. I plan on sitting against the wall / basically out of reach of her next time, but I'd like to know some other subtle ways I can let her know I'm not interested. I don't want to approach her and have things be awkward from here on out so I'd like to just make my thoughts known.