It was this Saturday night, me (20 M) and my friends went out to a night club to have a drink and when we left, we decided to go to a nearby SC.
We were seated, ordered a drink and talked to a few girls that came to us. We didn't get any dances at first, just casually chatted with them. The first 2 that came together were telling us that people in here are pieces of shit etc.
After that, we finished our drinks and one of my friends decided it's time for him to get a dance, so he approached a dancer and went in. Shortly after he comes back (10-15 minutes), another girl approaches us.
At first, I didn't even see realize that she came over and was talking to my friends. She was mainly talking to the friend that just got a dance with another girl and was asking him for another. He didn't want to spend any more money so he pointed at me and said "why don't you take him for a dance instead?". I instantly looked away as a response as I wasn't expecting that, trying to avoid the situation. After that, she noticed me and came by me, playing with my hair as she was still trying to convince my friend for another ~10 secs.
Suddenly, she targeted me, calling me the best looking the the friend group and biting my ear making tiger sounds. Since I didn't get a dance yet, and was planning to do so, I asked her if she wants to dance. So I got up to get some cash from my jacket that was on the seat next to me, her slapping my ass in the process and acting impressed by it (lol).
So, to the dance... It wasn't what I was expecting (in a good way). She started grinding all over me and grabbing my pecker every now and then to check if I was aroused or not. At first, I was on the shy side, feeling kinda embarrassed, so I couldn't get a hard one. Every time she was feeling it softer she would start grinding faster and harder in an attempt to get me hard. 1-2 minutes in, I finally got comfortable and started enjoying it, trying to respect her during the dance. She was driving me crazy by biting my ear and doing tiger sounds in my ear, I couldn't get enough of it. 5 minutes in, she sat and laid on me, showing her boobs in a way that I found an indication to grab them. Since I didn't want to disrespect her (if my instinct was false), I slowly started reaching with one hand while watching her facial expressions, giving her time to react if I was mistaken. She was smiling so I took that as a yes, gently grabbing her boobs (I feel like an asshole looking back at it as I didn't ask for verbal permission, but it felt right in the moment). So we sat another 1-2 minutes like that, me admiring her body and her giving me kisses on the cheek, while grabbing my dick once again (over the clothes, giving a small stroke and tickling the glans) telling me "oh, wooow" and giggling. After that she got up and showed me her body one last time for me to admire as she then went to wear her bra and I left the room (not VIP). The dance was supposed to last a song, but I ended up getting a 7-8 minute dance.
Overall, I loved the experience, it was far better than I expected.
Lastly, I wanted to ask 2 things about this whole experience:
What could make her shift focus from my friends to me so quickly and aggressively? I feel like I am not that attractive as most of my friends, did she smell the insecurity? Did she target me because of my clothing? Did I look like a looser? Or did I just seem a nice guy that won't disrespect her during the dance and possibly not a creep?
And most importantly, was I a dick for doing that during the dance?

Money is your answer. šø
What could make her shift focus from my friends to me so quickly and aggressively? Answer: Your friend indicated he was done spending and directed her to you. Therefore you were a warm prospect, offering a higher probability of spending vs staying where she was and trying to overcome your friend's objections, or approaching someone cold.
I feel like I am not that attractive as most of my friends, did she smell the insecurity? Answer: No, she smelled the money. So long as you didn't look broke, homeless, or otherwise gross, your attractiveness is relatively unimportant, so she will approach. Also, looking insecure/naive would suggest you're an easier target then some hardened regular, making it more likely she can get you to open up your wallet.
Did she target me because of my clothing? Answer: No, not directly. In addition to being recommended by your friend, your clothing wasn't off-putting, which is all that mattered. The only time clothing may play a role is if she's seeking a high-roller (like in Vegas clubs when sizing up cold prospects), which doesn't sound like she was.
Did I look like a looser? Answer: I think you mean "loser." Again, the answer is no. You likely looked like an average PL from whom she could likely pry a few dances worth of money.
Or did I just seem a nice guy that won't disrespect her during the dance and possibly not a creep? Answer: No - Again, you didn't look threatening or like a waste of time, plus you were a referral from a friend who already got dances. Basically, a warm lead. Also, peer pressure would make you more likely to buy. You didn't want to be "that guy" who walked into a strip club with friends, watched them indulge in libidinous fun, and then not partake when your turn came.
Welcome to the world of strip clubs. Remember - Don't fall in love, bring sufficient cash so you don't spend with credit cards, and avoid the ATM (although, we've all occasionally done the walk of ATM shame).